ZTTO M840 CNC Aluminium Alloy 4 Piston Hydraulic Disc Brake Kit Front Rear MTB Hydraulic Disc Brake Kit Bike Oil Disc Brake Kit Description: Specification: Material: aluminum alloy Color: black, red, blue, purple (optional) Tube length: Front: 800mm Rear: 1450mm Item Weight: 575g / 1.3lb Package size: 240*200*70mm/9.4*7.9*2.8in Packed Weight: 780g / 1.7lb Specifications: Four-piston driveThe brake pads automatically return, the braking is stable and the braking force is strong. Aluminum forgingSturdy and wear-resistant, can brake quickly and reset in time. SuitableSuitable for cycling enthusiasts or beginners who are just beginning to try cycling [Universal] The length of the front tube is 800mm, and the length of the rear tube is 1450mm Easy installationIt is very easy to install by yourself Package Included: 1 Pair of Bike Oil Disc Brake