TRP Hylex RS Disc Brake. Features: Fully hydraulic brake system for Singlespeed, Cyclocross, or custom applications Features weight-saving drilled out lever blade Heat dissipating composite pistons self-adjust for pad wear Includes hood-internal master cylinder, caliper & 5.0 x 1900mm hose (F&R) Semi-metallic pads All TRP hydraulic brakes use mineral oil Rotors are not included Specs: Kit Hose Length:rear (1900mm) Caliper:flat mount Rotor:separate Color:black Weight:411g