Hydraulic deore m535 disc brake kit includes deore lever calliper with 900 mm hose and 6 bolt rotor fully bled ready to fit using opposed 2 piston design to fit international and post mount forks mineral oil is non corrosive and less hazardous than conventional hydraulic fluid shim less mounting bracket allows for quick installation and set up 6 bolt rotor mounting using a 160 mm disc comes as standard with resin pads and spare olive insert mineral oil