Feature: 1. SUITABLE FOR BIKE TYPE: Bike cassette body tool is not easy to corrode and rust, high strength, support 11 speed bikes. 2. FINE POLISHED: Bike cassette body is made of fine manufacturing process, the surface is fine polished and sanded, high strength and improve the reliability of fastening. 3. ALUMINUM ALLOY MATERIAL: Our bike cassette freehub body tool is made of aluminum alloy material, strong and durable. 4. SMALL SIZE: Bike cassette body is light weight, small size, easy to carry, it is a DIY replacement part for your bike. 5. SAVE TIME AND EFFORT: The small size of bike cassette body is easy for you to install and remove, save your time and effort. Specification: Item Type: Bike Cassette Body Tool Material: Aluminum Alloy Structure: 2 Bearing Application: Support for 11 speed bikes(8-10 speeds need to add 1.85mm washer). Package List: 1 x Cassette Body1 x Washer