The Shimano XTR BR-M9120 caliper features consistent braking performance and reliable stopping power in all conditions. The caliper features a MONO-BODY design, machined from a single cold-forged block to maximize rigidity, and four ceramic pistons for perfect, Rider Tuned stopping power. The 4-piston caliper instills greater downhill confidence and control. Details: Model No: BR-M9120 Series: XTR M9100 Pistons: 4 Mount: Post mount Included brake pads: N04C Fits front or rear brake Compatibility: Brake lever: BL-M9120 Brake hose: SM-BH90-SBM Oil: Shimano Hydraulic Mineral Oil Brake pad: D02S metal, D03S resin, N03A resin, N04C metal