Experience exceptional braking performance with our 4-piston brakes! Our hydraulic brake is pre-bled for easy installation on your e-bike. Take control with the left lever for the front brake and the right lever for the rear brake. Plus, our brakes come equipped with two 2-pin waterproof sensors for power-off control. Our brake system boasts a front cable length of 1.2m and a rear cable length of 2.3mm. The brake levers feature 2.5 fingers and are compatible with 140mm, 160mm, 180mm, and 203mm bike rotors (mounting bolts not included). The power-off control comes with a 2-pin 250mm waterproof connector for added convenience. Our calipers are made with a one-piece forged aluminum body, while the brackets and levers are made of forged aluminum for maximum durability. The mounting options are Post/IS mount, and the reed switch and two-piece designed bracket are also included. Our calipers are made with a one-piece forged aluminum body, while the brackets and levers are made of forged aluminum for maximum durability. The hydraulic bike brakes bleed kit included in the Convenient Kits is an essential tool for maintaining hydraulic bicycle brakes and significantly extending their service life. Rest assured that any questions or problems you may have with this kit will be promptly addressed by our team of experts.