Intended use is pedal assist E-MTB 4-piston forged caliper with 4 -16mm ceramic/steel hybrid pistons. Top-loading pad design E2.3 rotor is required (2.3mm thickness) Aaron Gwin designed alloy lever blade Tool-free indexed reach adjustment EZ-Plug system: pre-bled and plugged at both ends of the 5.0 x 1900mm hose (F & R); extra olive and barb included Sintered Metallic brake pads included Rotor and adapter sold separately Levers are I-Spec II compatible with no adapter Matchmaker adapters are sold separately All TRP hydraulic brakes use mineral oil