Description: Powerful Braking: Bicycle hydraulic disc brakes, dual way brake system, synchronous oil pressure transmission, integrated calipers improve rigidity; provides super strong and uniform braking force, 2 pistons, helping you braking easier, braking at one touch Special Design: Hydraulic disc brake set, the pivot point of the bearing is hollowed out, improves the feel of brakes, the finely carved brakes lock the calipers better, so as to have a super competitive braking experience. Easy installation: Bicycle disc brake kit, split design, internal wiring more convenient to install, Enlarging the piston provides more braking force. Good Heat Dissipation: Brake discs front and rear bike, high performance heat dissipation pads, multi metal copper based ceramic formula, unique aluminum wing design, improve heat dissipation performance by 25% Brake directionThis mtb hydraulic disc brakes set adopts front and Rear braking method, front hose length: 850mm, rear hose Length: 1550mm, Please ensure the brake oil hose is sufficient for your bike before purchasing Specification: Material: Aluminum Alloy Adapter Inner Opening: 34mm/1.34inch Adapter Outer Opening:70mm/2.76inch Front brake hose Length: 850mm/33.46inch Rear brake hose Length: 1550mm/61.02inch Package Includes: 1Pair Bicycle Hydraulic Disc Brake Note: Please allow slightly errors due to manual measurement and different monitors.