Description:Made with quality Aluminum alloy and high temperature resistant material, perfect replacement of the original ceramic piston, eliminate side leakage, make the brake safer, full and longer braking force, good sealing, strip groove design, reduce heat transfer contact area, increase air flow Shuttle is conducive to heat dissipation.Applicable for: M675 M7000 M7100 Caliper; Mountain Bike XT Series-M785 M8000 M8100 Caliper; XTR Series-M9020 M9000 M9100 Caliper; Sports car/road car R7070 R8070 R9170 RS785 RS805 CaliperMaterial: Aluminum alloy, high temperature resistant materialSize: 21.9mmx9mm/0.86x0.35inPackage Includes:4 Pieces Pistons4 Pieces Piston Sealing Rings4 Pieces Disc Brake Sealing Rings8 Pieces Small Sealing RingsNote:Please allow slightly measuring deviation due to manual measurement.