Features1The dual braking 4 piston transfers oil pressure directly to the brake block, keeping the brake stable and making brake transmission more efficient. 2Integrated cylinder design has strong sealing, which can reduce maintenance times and bring lightweight effect. 3Bicycle oil pressure disc brake set has flexible control, allows single or double finger operation, non slip surface particles will not slip off. 4Hole diameter of 22.2mm/0.9in is basically suitable for the installation of models on the market. 5Adjustable brake handle oil pump can control the amount of oil pumping and travel to improve the performance of your bike.SpecificationItem Type: 4 Piston Oil Pressure Disc BrakeMaterial: Aluminum AlloyColor: BlackApplication: for MTB, BicycleWeight: Approx.986g/34.8ozProduct Style: 1 Pair of 4 Piston Oil Brake (Left Rear/Right Front) + 1 Pair of Disc Brake 160mmTubing: Front Tubing Length 800mm/31.5in, Rear Tubing Length 1400mm/55.1inSuitable: 160mm/6.3in DiscPackage List1 x Pair of Oil Brake16 x Screw2 x Disc