Features1Aluminum 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 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, 810 speed, requires 1.85mm washer.SpecificationItem Type: Bike Cassette BodyMaterial: Aluminum AlloyWeight: Approx. 92g / 3.2ozStructure: 2 BearingApplication: Suitable For 44mm / 1.7in Outer Diameter, 7.1mm / 0.3in Height, 36 Tooth Rings, 72 Rings, Supports for11 Speed, 8-10 Speed, Requires 1.85mm WasherPackage List1 x Bike CassetteBody1 xWasher