Feature: 1. This 4-piston dual drive, four pistons on both sides at the same time to hold the discs, improving braking performance over single/dual piston designs, while also prevents rotor deformation. 2. The metal brake pads wear-resistant and waterproof, does not hurt the disc, no noise, and further improves the braking effect. 3. Three-finger brake handle, ergonomic design, non-slip particles, comfortable grip, anti-detachment. 4. Hydraulic bike brakes adopt integrated hydraulic cylinder with strong sealing to avoid oil leakage and air intake of the brake handle, lightweight design. 5. Suitable for mountain bike, MTB, road bike, electric bike, scooter, folding bikes, fat bike, etc. Specification: This hydraulic disc brake kit is constructed using high grade aluminium alloy, not only no squeaking from the brakes rubbing, high temperature resistance and anti-breaking, will not affected by extreme weather like rain and snow. Features: This 4-piston dual drive, four pistons on both sides at the same time to hold the discs, improving braking performance over single/dual piston designs, while also prevents rotor deformation. The metal brake pads wear-resistant and waterproof, does not hurt the disc, no noise, and further improves the braking effect. Three-finger brake handle, ergonomic design, non-slip particles, comfortable grip, anti-detachment. Hydraulic bike brakes adopt integrated hydraulic cylinder with strong sealing to avoid oil leakage and air intake of the brake handle, lightweight design. Suitable for mountain bike, MTB, road bike, electric bike, scooter, folding bikes, fat bike, etc. Specifications: Material: Aluminum alloy Front oil pipe length: 850mm/ 33.5in Rear oil pipe length: 1550mm/ 61in Weight: 710g/ 25oz Package List: 1 * Pair of Bike Hydraulic Disc Brakes Package List: 1 * Pair of Bike Hydraulic Disc Brakes