Item Type: Bike Cassette Body Material: Aluminum Alloy Weight: Approx. 92g / 3.2oz Structure: 2 Bearing Application: Suitable For 44mm / 1.7in Outer Diameter, 7.1mm / 0.3in Height, 36 Tooth Rings, 72 Rings, Supports for 11 Speed, 8-10 Speed, Requires 1.85mm Washer1Aluminum Alloy Material: The bicycle cassette body is made of aluminum alloy material, which is sturdy and durable, not easy to corrode or rust, has high strength, and long service life. 2Exquisite Workmanship: The mountain bike cassette body adopts excellent manufacturing technology, and the surface is finely polished to ensure strength and improve fastening reliability. 3Portability and Replacement: The road bike cassette body is rust proof, lightweight, small in size, and easy to carry. It is a DIY replacement part for bicycles. 4Easy Installation: The bike cassette body adopts a small sized design, making it easy for you to install and disassemble, saving you time and effort. 5Scope of Application: Mountain bike cassette sprocket tower base is suitable for 44mm / 1. 7in outer diameter, 7. 1mm / 0. 3in height, 36 tooth rings, 72 rings, supports for 11 speed, 8?10 speed, requires 1. 85mm washer. 1 x Bike Cassette&nbspBody 1 x&nbspWasher