Shimano P03A-RF Disc Brake Pads and Springs - Resin Compound, Finned Aluminum Back Plate, One PairShimano P03A disc brake pads Shimano P04A RF brake pads with resin compound offers less noise and better modulation Aluminum radiator fins provides a long pad life and less fade by cooling technology Compatible with Shimano Models: XT BR M8220 and XTR BR M9220 4 piston calipers Designed to eliminate pad rattling and reduced noise Product Specifics Backing Plate Material: Aluminum Compound: Resin Compound: Organic Heat Sink: Yes keyword search: po3