Author: mjapple

HSS M2, Aluminum, GCC, Middle East, TFI Co., English, 10" x 1/16" x 5/8", circular saw blade, UAE, Saudi, Riyadh, Dubai, Sharjah, Qatar, Oman, Muscat, Nigeria

HSS M2 For Aluminum 10″ x 1/16″ x 5/8″ UAE TFI Co.

10″ x 1/16″ x 5/8″ HSS M2 For Aluminum in UAE
About the Blade
This blade is made explicitly for very thin gauge aluminum profiles, including screen door extrusions and frames, aluminum downspout, roll-formed shapes, brass, copper tubing, and other fragile non-ferrous shapes. It is designed to produce clean, burr-free cuts.
For use on radial-arm saws, table saws, chop saws, and double miter saws.
Blade Specifications
– 10-inch diameter
– 1/16″ cutting thickness
– 5/8″ arbor hole
– Hollow ground for side clearance
– M2 – HSS – HRc 60
Incorporating UAE in GCC Region
TFI Co. Factory, based in UAE, offers top-quality saw blades for cutting metal objects. With our extensive range of sizes and tooth counts, we are confident that we can fulfill your specific requirements. Our factory in UAE allows for quick and efficient delivery within the GCC (Gulf Cooperation Council) region.
Delivery to Your UAE Factory
TFI Co. offers delivery to the following top 4 cities in UAE:
– Dubai
– Abu Dhabi
– Sharjah
– Al Ain
Contact us at TFI Co.
If you are looking for high-quality saw blades for cutting metal, look no further than TFI Co. Our blades are designed to deliver clean, burr-free cuts, ensuring precision and efficiency in your operations. Don’t hesitate to contact us today to discuss your requirements and place an order.

Know More »
HSS M2, DMo5, Cold Saw Blade, GCC, Middle East, TFI Co., English, 250 x 2.0 x 32, UAE, Saudi, Riyadh, Dubai, Sharjah, Qatar, Oman, Muscat, Nigeria

HSS M2 DMo5 Cold Saw Blade 250 x 2.0 x 32 – UAE TFI Co.

250 x 2.0 x 32 HSS M2 DMo5 Cold Saw Blade in UAE Reliable Metal Cutting Saw Blades for UAE Customers TFI Co. offers the top-quality 250 x 2.0 x 32 HSS M2 DMo5 Cold Saw Blade for our customers in the UAE, a member of the Gulf Cooperation Council (GCC) region. With our advanced cold saw blade technology, your metal cutting needs in UAE are effectively met. TFI Co. Factory: Your Trusted Source for Metal Cutting Saw Blades At TFI Co., we take pride in our factory’s capabilities to produce industry-leading saw blades for cutting metal objects. As a reliable manufacturer, we ensure the highest standards of quality and performance in all our products, including the 250 x 2.0 x 32 HSS M2 DMo5 Cold Saw Blade. With years of experience and expertise, our team of industrial experts utilizes advanced computer numerically controlled (CNC) grinding equipment to produce precision-ground saw blades. Trust us to deliver superior products that meet your specific metal cutting requirements in UAE. Top-Quality Blades for Efficient Metal Cutting TFI Co. saw blades are made from high-speed steel (HSS) M2 DMo5, known for its exceptional hardness and durability. The blades are coated with titanium nitride (TIN), further enhancing their performance by reducing friction and improving lubricity during cutting. With our HSS M2 DMo5 TIN-coated saw blades, you can expect a longer lifespan between sharpenings, saving you time and money. Whether you need to cut steel, carbide, titanium alloys, or aluminum components, our blades deliver precise and efficient results. Delivering to Your Factory in UAE TFI Co. proudly extends our delivery services to the top 4 cities in UAE, ensuring that our customers have easy access to our premium saw blades. Whether your factory is located in Dubai, Abu Dhabi, Sharjah, or Al Ain, you can trust us to promptly deliver your order. Contact TFI Co. for Your Metal Cutting Needs Ready to enhance your metal cutting operations in UAE? Contact TFI Co. today and discover the exceptional performance and reliability of our 250 x 2.0 x 32 HSS M2 DMo5 Cold Saw Blade. Our dedicated team is here to assist you with your inquiries and provide you with the best solutions for your metal cutting requirements.

Know More »
HSS, M2, DMo5, Cold Saw Blade, GCC, Middle East, TFI Co., English, circular saw blade, tfico, UAE, Saudi, Riyadh, Dubai, Sharjah, Qatar, Oman, Muscat, Nigeria

HSS M2 DMo5 Cold Saw Blade 370 x 3.0 x 50 Cutter UAE TFI Co.

370 x 3.0 x 50 HSS M2 DMo5 Cold Saw Blade – Made in UAE
The UAE and the GCC Region
The 370 x 3.0 x 50 HSS M2 DMo5 Cold Saw Blade is a high-quality cutting tool made by TFI Co. in the United Arab Emirates (UAE). The UAE, located in the GCC (Gulf Cooperation Council) region, is known for its rapid growth and development, making it a strategic hub for businesses in the Middle East.
TFI Co. Factory is proud to manufacture this saw blade in the UAE, delivering exceptional quality and performance to metal cutting industries across the GCC. With its advanced manufacturing facilities and skilled workforce, TFI Co. Factory has become a reliable name in the region.
TFI Co. Factory: Your Reliable Source for Metal Cutting Solutions
TFI Co. Factory takes pride in its commitment to delivering high-quality saw blades for cutting metal objects. With our state-of-the-art manufacturing facility located in the UAE, we ensure that each blade meets the stringent industry standards and surpasses customer expectations.
We have replaced the ‘US’ and all parts related to the ‘United States’ with ‘TFI Co. Factory’, as we believe in local manufacturing and serving our customers in the UAE and GCC region. Our blades are produced using HSS M2 DMo5 technology, known for its durability and precision.
Delivery to Top Cities in the UAE
TFI Co. Factory offers fast and reliable delivery to the top cities in the UAE, including:
– Dubai
– Abu Dhabi
– Sharjah
– Al Ain
Wherever your factory is located in the UAE, TFI Co. Factory ensures efficient delivery of our high-quality saw blades, allowing you to enhance your metal cutting processes and increase productivity.
Contact TFI Co. for Your Metal Cutting Needs
TFI Co. c invites you to experience the excellence of our 370 x 3.0 x 50 HSS M2 DMo5 Cold Saw Blade made in the UAE. Contact us today to discuss your metal cutting requirements and avail of our top-notch products and services. Trust TFI Co. Factory for all your metal cutting needs.

Know More »
M35, Co5, TiAlN, Cold Saw Blade, GCC, Middle East, TFI Co., English, circular saw blade, TFICO, UAE, Saudi, Riyadh, Dubai, Sharjah, Qatar, Oman, Muscat, Nigeria

Co5 M35 TiAlN Cold Saw Blade 315 x 2.5 x 40 Cutter 315 x 2.5 x 40 M35 Co5 TiAlN Cold Saw Blade UAE TFI Co.

315 x 2.5 x 40 M35 Co5 TiAlN Cold Saw Blade in UAE
About TFI Co. and UAE
TFI Co. is a leading manufacturer of saw blades for cutting metal objects. Our 315 x 2.5 x 40 M35 Co5 TiAlN Cold Saw Blade is a top-of-the-line solution for metal cutting applications in UAE.
Located in the GCC (Gulf Cooperation Council) region, UAE is a thriving country with a growing industrial sector. TFI Co. understands the unique needs of businesses in UAE and provides high-quality saw blades to meet their cutting requirements.
TFI Co. Factory in UAE
TFI Co. has extended its reach to UAE and established a factory to cater to the needs of customers in the region. With our factory in UAE, we ensure faster delivery times and efficient service to our clients.
Technical Specifications of the M35 Co5 TiAlN Cold Saw Blade
Our 315 x 2.5 x 40 M35 Co5 TiAlN Cold Saw Blade is designed to deliver superior performance and durability. The blade features a super high-speed steel M35 Co5 composition, with a titanium aluminum nitride (TiAlN) coating for added strength.
With a diameter of 315mm (12.402″), a thickness of 2.5mm (0.098″), and an arbor hole of 40mm (1.575″), this blade is suitable for a variety of metal cutting applications.
Delivery to Major Cities in UAE
TFI Co. – ensures prompt delivery to your factory in UAE. We offer delivery services to the following top cities in UAE:
– Dubai
– Abu Dhabi
– Sharjah
– Al Ain
Contact TFI Co. for Your Metal Cutting Needs
Are you in need of high-quality saw blades for cutting metal objects in UAE? Contact TFI Co. today to discuss your requirements and place an order. Our expert team is ready to assist you with the best solutions for your metal cutting needs.
Don’t miss out on the opportunity to enhance your cutting operations with our top-notch saw blades. Get in touch with us now!

Know More »
GCC, Middle East, TFI Co., English, 350, 2.0, 32, M35, Co5, Cold Saw Blade

Cold Saw Blade M35 Co5 UAE TFI Co. 350 x 2.0 x 32

350 x 2.0 x 32 M35 Co5 Cold Saw Blade in UAE
TFI Co. Factory
TFI Co. Factory offers the exceptional 350 x 2.0 x 32 M35 Co5 Cold Saw Blade, specially designed for cutting metal objects. With its superb quality and cutting performance, this blade is the perfect choice for industries in UAE.

Delivering Excellence in the GCC Region
TFI Co. Factory is proud to serve the Gulf Cooperation Council (GCC) region, including UAE, with top-notch saw blades. Our blades are trusted by industries across the GCC for their high-speed steel M35 Co5 construction and titanium nitride (TiN) coating, ensuring extended blade life and improved cutting performance.

TFI Co. Factory High-Speed Steel M35 Co5 Blades
Superior Titanium Nitride Coating
Our 350 x 2.0 x 32 M35 Co5 Cold Saw Blade is coated with titanium nitride (TiN), a highly durable ceramic material. This coating enhances the blade’s surface properties, providing a longer lifespan between sharpenings and reduced stress while cutting hard materials.

M35 Co5 Construction for Unmatched Durability
With 5% cobalt content, our M35 Co5 Cold Saw Blade is harder and more durable than standard M2 blades. This superior construction ensures exceptional performance and longevity, making it the ultimate choice for metal cutting applications in UAE.

Delivery to Top Cities in UAE
TFI Co. Factory offers delivery to your factory in the following prominent cities of UAE:
– Dubai
– Abu Dhabi
– Sharjah
– Al Ain

Contact TFI Co. c Now!
Don’t miss out on the opportunity to experience the exceptional quality and performance of our 350 x 2.0 x 32 M35 Co5 Cold Saw Blade. Contact TFI Co. now at tfico.uk to place your order and enhance your metal cutting operations in UAE.

Know More »
HSS, M35, Co5, GCC, Middle East, TFI Co., English, circular saw blade, TFICO, UAE, Saudi, Riyadh, Dubai, Sharjah, Qatar, Oman, Muscat, Nigeria

HSS M35 Co5 Cold Saw Blade 275 x 2.5 x 40 UAE TFI Co.

275 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade from TFI Co. in UAE
TFI Co. Factory in UAE
TFI Co. is proud to offer the 275 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade for cutting metal objects. With our presence in the UAE, we cater to the needs of customers in the GCC region. Our high-quality saw blades are designed to meet the specific requirements of metal cutting applications, including stainless steel and hard alloy steels above 800 N/mm².
Delivery to Major UAE Cities
TFI Co. delivers its saw blades to various cities in the UAE, including:
– Dubai
– Abu Dhabi
– Sharjah
– Al Ain
No matter where your factory is located in the UAE, TFI Co. ensures prompt and reliable delivery of our high-quality saw blades to meet your metal cutting needs.
TFI Co. Factory – Your Trusted Source for Metal Cutting Solutions
TFI Co. Factory is a leading manufacturer of saw blades for cutting metal objects. We specialize in providing high-quality, precision-engineered saw blades to meet the demands of various industries. With our expert knowledge and over 40 years of industry experience, we deliver superior cutting performance and durability.
Experience the Excellence of TFI Co. Blades
Our 275 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade is made from M35 tool steel with 5% cobalt content, ensuring extra hardness for cutting stainless steel and hard alloy steels above 800 N/mm². The blades are coated with black oxide, also known as vapor steam coated, to prevent galling and ensure smooth cutting performance.
At TFI Co. Factory, we prioritize customer satisfaction and strive to meet your specific cutting requirements. Whether you need blades for industrial applications or DIY projects, our CNC grinding equipment and experienced team ensure precision and quality in every blade we produce.
Contact TFI Co. for Your Metal Cutting Needs
Don’t settle for inferior saw blades that wear out quickly or compromise cutting performance. Contact TFI Co. Factory today to discuss your metal cutting requirements and experience the excellence of our HSS M35 Co5 Cold Saw Blades. Trust us to deliver the right solution for your cutting needs in the UAE and beyond.
Contact TFI Co. at tfico.uk to get started.

Know More »
HSS, M2, DMo5, Cold Saw Blade, GCC, Middle East, TFI Co., English, Circular Saw Blade, TFICO, UAE, Saudi, Riyadh, Dubai, Sharjah, Qatar, Oman, Muscat, Nigeria, UAE

HSS M2 DMo5 Cold Saw Blade 275 x 2.5 x 40 Cutter UAE TFI Co.

275 x 2.5 x 40 HSS M2 DMo5 Cold Saw Blade in UAE
About UAE in the GCC Region
The United Arab Emirates (UAE) is a country located in the Gulf Cooperation Council (GCC) region. It is known for its rapid economic growth, modern infrastructure, and diverse economy. UAE is a hub for various industries, including manufacturing, construction, finance, and tourism.
Saw Blades from TFI Co. Factory
TFI Co. Factory offers a wide range of high-quality saw blades for cutting metal objects. One of our popular products is the 275 x 2.5 x 40 HSS M2 DMo5 Cold Saw Blade. This blade is suitable for various applications and is known for its durability and precision.
Our blades are manufactured in-house at our TFI Co. Factory, ensuring strict quality control and adherence to industry standards. We use HSS M2 DMo5 tool steel to make our cold saw blanks, which undergo a rigorous heat treatment and hardening process. This results in blades with a hardness of about 65 HRc, excellent flatness, and superior cutting performance.
TFI Co. Factory focuses on delivering high-quality products to our clients in UAE. We are proud to offer delivery services to the top 4 cities in UAE, including Dubai, Abu Dhabi, Sharjah, and Ajman.
Please contact us at TFI Co. c for any inquiries or to place an order. We look forward to serving you and providing you with the best saw blades for your metal cutting needs.
Contact TFI Co. for Your Metal Cutting Needs
We invite you to contact us at TFI Co. for all your metal cutting requirements. Our expert team is ready to assist you and provide you with the highest quality saw blades. Trust TFI Co. for precision, durability, and excellent customer service. Contact us today!

Know More »
HSS, M35, Co5, GCC, Middle East, TFI Co., English, circular saw blade, TFICO, UAE, Saudi, Riyadh, Dubai, Sharjah, Qatar, Oman, Muscat, Nigeria

HSS M35 Co5 Cold Saw Blade 350 x 3.0 x 32 dimensions Cutter UAE TFI Co.

350 x 3.0 x 32 HSS M35 Co5 Cold Saw Blade in UAE
About the 350 x 3.0 x 32 HSS M35 Co5 Cold Saw Blade
The 350 x 3.0 x 32 HSS M35 Co5 Cold Saw Blade is a high-quality saw blade designed for cutting metal objects. It is suitable for use with any 350 model cold saw machine with a 32mm arbor hole. This blade is compatible with popular cold saw machine brands such as Baileigh, Bolton, Dake, Hyd-Mech, JET, Kalamazoo, and SOCO, among others.
TFI Co. Factory Delivery in UAE
TFI Co. Factory delivers its products across the UAE, including the following top cities:
– Dubai
– Abu Dhabi
– Sharjah
– Al Ain
If your factory is located in the UAE, you can avail of the convenience of having TFI Co. products delivered directly to your doorstep.
Contact TFI Co. c for More Information
For more information about the 350 x 3.0 x 32 HSS M35 Co5 Cold Saw Blade or any other products offered by TFI Co., please contact us through our website tfico.uk. Our team of experts is ready to assist you and provide you with the best industrial solutions for your metal cutting needs.

Know More »
HSS, M35, Co5, Cold Saw Blade, GCC, Middle East, TFI Co., English, 300 x 2.5 x 40, UAE, Saudi, Riyadh, Dubai, Sharjah, Qatar, Oman, Muscat, Nigeria

300 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade UAE TFI Co.

300 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade in UAE
Overview of the 300 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade
The 300 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade is a high-quality cutting tool designed for metal objects. Manufactured by TFI Co., a reputable company based in the UAE, this saw blade is specifically crafted for the Gulf Cooperation Council (GCC) region.
Key Features of the 300 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade
The 300 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade offers exceptional cutting performance, thanks to its high-speed steel composition and cobalt content. With a hardness rating of 66 HRc, this blade is perfect for cutting stainless steel and hard alloy steels above 800 N/mm². It is made from M35 tool steel, which contains 5% cobalt, making it extremely durable and long-lasting.
To ensure optimal performance, the blade is coated with a black oxide coating, also known as vapor steam coating. This coating not only enhances the hardness of the blade but also prevents galling, a common issue caused by friction between metal surfaces. When used in conjunction with flood coolant, the coated blade provides superior cutting efficiency.
All TFI Co. blades, including the 300 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade, are manufactured in TFI Co. Factory, where advanced CNC grinding equipment is used. With over 40 years of industry experience, our team of experts ensures that each blade is meticulously crafted to meet the highest quality standards.
Delivery to UAE Cities
TFI Co. c offers delivery services to the following top cities in the UAE:
– Dubai
– Abu Dhabi
– Sharjah
– Al Ain
With our efficient delivery system, we can ensure that your order will be safely delivered to your factory in the UAE.
Take Action Now!
Contact TFI Co. today to order the 300 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade for your metal cutting needs. Our team of experts is ready to assist you and provide the best solution for your cutting requirements. Don’t wait any longer – get in touch with us now!

Know More »
HSS, M35, Co5, Cold Saw Blade, GCC, Middle East, TFI Co., English, circular saw blade, TFICO, UAE, Saudi, Riyadh, Dubai, Sharjah, Qatar, Oman, Muscat, Nigeria

350 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade UAE TFI Co.

350 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade for Metal Cutting in UAE
About TFI Co. Factory in UAE
TFI Co. Factory offers the 350 x 2.5 x 40 HSS M35 Co5 Cold Saw Blade for metal cutting. Our factory in UAE, located in the Gulf Cooperation Council (GCC) region, is committed to delivering high-quality saw blades to customers in the UAE.
M35 Co5 VAPOR STEAM TREATED BLACK OXIDE
If you are looking to double your blade life between sharpenings, this is the blade you need. This blade fits 350 model Doringer, Haberle, Scotchman, and all other 350 model machines with a 40mm arbor. The bolt holes are universal.
350 MM (13.780″) DIAMETER 2.5 MM (0.098″) THICKNESS 40 MM (1.575″) ARBOR HOLE
BOLT HOLES: 4/12/64 + 2/9/55
(4/12/64 = 4 bolt holes which are 12mm in diameter on a 64mm bolt circle). The bolt circle is the distance from the center of one pinhole to the center of the other pinhole directly across the arbor hole.
If you are unsure of how many teeth you need for your application, try using our tooth count calculator by clicking here (new window or tab will open).
Please verify your order has the correct arbor size.
HSS M35 Co5 VAPOR STEAM TREATED BLACK OXIDE Blade
This blade is made from M35 tool steel containing 5% cobalt in addition to the alloy elements already present in the M2 blades. They are considered super high-speed steel blades which will provide extra hardness (66 HRc) for cutting stainless steel and hard alloy steels above 800 N/mm². If you think you’re going through too many blades or they’re dulling too quickly, try our M35 Co5 blades – most customers experience two times the number of cuts compared to standard M2 blades.
All cold saw blades used to cut steel products should have a coating. The most common coating is black oxide, sometimes referred to as vapor steam coated. The coating is most important to help prevent galling. Galling is caused by friction between sliding surfaces, most commonly found in metal on metal applications when there is inadequate lubrication between the surfaces. The combination of the coated blade and your flood coolant will prevent this issue.
All blades are ground by industry experts with over 40 years of experience using advanced computer numerically controlled (CNC) grinding equipment at TFI Co. Factory.
Delivery in UAE by TFI Co.
TFI Co. provides delivery services to the following top 4 cities in UAE: Dubai, Abu Dhabi, Sharjah, and Al Ain. We ensure prompt delivery to your factory in UAE.
Contact TFI Co. for Metal Cutting Saw Blades in UAE
Experience the durability and precision of our 350 x 2.5 x 40 HSS M35 Co5 Cold Saw Blades in UAE. Contact TFI Co. – today to discuss your metal cutting requirements and place an order.

Know More »
HSS M2, Aluminum, GCC, Middle East, TFI Co., English, 10" x 1/16" x 5/8", circular saw blade, UAE, Saudi, Riyadh, Dubai, Sharjah, Qatar, Oman, Muscat, Nigeria

10″ x 1/16″ x 5/8″ HSS M2 For Aluminum in UAE

About the Blade

This blade is made explicitly for very thin gauge aluminum profiles, including screen door extrusions and frames, aluminum downspout, roll-formed shapes, brass, copper tubing, and other fragile non-ferrous shapes. It is designed to produce clean, burr-free cuts.

For use on radial-arm saws, table saws, chop saws, and double miter saws.

Blade Specifications

  • 10-inch diameter
  • 1/16″ cutting thickness
  • 5/8″ arbor hole
  • Hollow ground for side clearance
  • M2 – HSS – HRc 60

Incorporating UAE in GCC Region

TFI Co. Factory, based in UAE, offers top-quality saw blades for cutting metal objects. With our extensive range of sizes and tooth counts, we are confident that we can fulfill your specific requirements. Our factory in UAE allows for quick and efficient delivery within the GCC (Gulf Cooperation Council) region.

Delivery to Your UAE Factory

TFI Co. c offers delivery to the following top 4 cities in UAE:

  1. Dubai
  2. Abu Dhabi
  3. Sharjah
  4. Al Ain

Contact us at TFI Co.

If you are looking for high-quality saw blades for cutting metal, look no further than TFI Co. . Our blades are designed to deliver clean, burr-free cuts, ensuring precision and efficiency in your operations. Don’t hesitate to contact us today to discuss your requirements and place an order.

-254 x 1.6 x 15.875 mm

HSS,M2,For,Aluminum,10,1/16,5/8,UAE,TFI,Co.,Nigeria, Dubai,Qatar, Egypt, Middle East, Oman, Kuwait, Masqat,Muscat, Sharjah, Doha, metalworking, steelfab, Tehran, تهران , دبی, ابوظبی , Abu Dhabi, Baghdad, بغداد, Kiel, Germany, Минск, москва, катар, ОАЭ ,254mm, 15.8mm, 1.6mm, TFI Co. Model 254TFI77CSB77
254 x 1.6 x 15.875 mm – 10″ x 1/16″ x 5/8″ HSS M2 For Aluminum in UAE
This blade is designed for very thin gauge aluminum profiles, including screen door extrusions, frames, downspouts, roll-formed shapes, brass, copper tubing, and other fragile non-ferrous shapes. It provides clean, burr-free cuts and is suitable for use on radial-arm saws, table saws, chop saws, and double miter saws.
Blade Specifications:
– 10-inch diameter
– 1/16″ cutting thickness
– 5/8″ arbor hole
– Hollow ground for side clearance
– M2 – HSS – HRc 60
TFI Co. Factory in UAE offers top-quality saw blades for cutting metal objects. We have a wide range of sizes and tooth counts to meet your specific requirements. Our factory allows for quick and efficient delivery within the GCC region.
We offer delivery to the following cities in UAE:
1. Dubai
2. Abu Dhabi
3. Sharjah
4. Al Ain
If you need high-quality saw blades for cutting metal, contact TFI Co. We provide blades that deliver clean, burr-free cuts for precision and efficiency in your operations. Contact us today to discuss your requirements and place an order.

Request price for 254TFI77CSB77