★【EASY BRAKING】★ Mountain bike hydraulic oil brake, dual-piston brake, no matter how fast the speed, how steep the terrain, how wet the environment, gently pull the brake lever to stop immediately. ★【SINGLE, DOUBLE BRAKE LEVER】★ Single, double finger brake lever is designed according to the human body, flexible control, antislip surface particles, antislip do not release. The brake is easy to operate, the front and rear, left and right are in line with the usage habits. ★【UPDATED SAFETY】★ Double braking with four pistons can directly transfer the oil pressure to the brake block stable and make the brake transmission more efficient. Even if you are in bad terrain and weather, the brake set will still guarantee efficient braking. ★【ADJUSTABLE OIL PUMP STROKE】★ This hydraulic disc brake Integrated cylinder design, strong sealing, reduce maintenance times, lightweight design. Brake handle oil pump stroke can be adjusted to control pump oil amount and stroke. ★【BRAKE SIZE】★ MT420 for hydraulic brake, the right front brake hose length is 800mm, and the left rear brake hose length is 1400mm. Compatible with 160mm rotor by default, 22.2mm/0.87in is basically suitable for the installation of models on the market.