Carbon actuation arm for maximum rigidity, and weight savings Dual piston actuation Works with ALL cable actuated road levers. Compression less (linear strand) housing is highly recommended TRP ultra-grippy semi-metallic pads. These are compatible with Shimano M525/M515 pads Rotors, adapters, and flat mount mounting bolts sold separately All flat mount calipers being mounted to the fork require the FF-5 Front Flat Mount 140/160mm adapter Sold as a caliper only not a set