Description: Made of high quality carbon fiber, 5.45cm long Replacement inserts for use with bicycle brakes Special inserts designed for wheels with carbon rims/carbon braking surface Pack contains 2 brake inserts (1 pair) can be used on either front or rear brakes Can be used on any tubular or clincher rim with a carbon braking surface Specification: Material: Carbon Fiber Length: Approx. 5.45cm / 2.1inch Package Includes: 2 Pieces Brake Pads Inserts Note: Please allow 5-8mm size deviation and slight color difference. Any question about installation, feel free to contact us