●Ready & Go :One-piece Cylinder, Prebleed, the caliper designed to line pull with hydraulic brake system. ●Two Side Braking:to reducing wear and tear of the brake rotors. ●It is made of aluminum by CNC cutting and PVD finish.(Looks like a mirror) ●It have better brake pads,and already installed,READY AND GO. ●Note Please do not take the yellow BLOCK pads off when you make a brake.