The hydraulic disc brake is made of high-quality aluminum alloy material, with double piston to increase the friction area Keep the rotor in the proper center position, with uniform force and less prone to deformation Wear-, sensitive, strong performance, no noise when , will not damage the disc brake rotor Adapter for mountain bike, , road bike, e-bike, scooter, folding bike, fat bike, BMX, etc. Please do not remove the brake pad protection plate to press the brake lever before installation, otherwise it will cause oil leakage The hydraulic disc brake set features an ergonomically designed three-finger brake lever to help you brake more easily Colour:Green Material:Aluminum Alloy Package Contents: 1 x Hydraulic disc brake assembly Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.