hydraulic disc brake set: BL-M4100 brake lever BR-MT420 caliper incl. D03S Resin brake pads SM-BH90-SS brake hose Material: lever: aluminium (anodized)master cylinder, caliper: aluminium (painted)pistons: resinhardware: stainless steel, steel Compatibility: brake pads: D03S Resin, D02S Metal...