Shimano BR-M9120/M8120 Resin Pad W/ Fin 4-piston N03AModel No. NO3A Model Type Resin Stopping Power Rating Above Average Resin Pads Less noise and better modulation Radiator Fin: Provides long pad life and less fade by cooling technology Model Compatibility: BR M9120 Resin Brake Pads Much quieter than metal brake pads, the Softer material allows the brake to be quieter. Great for dry conditions where you don't need to worry about getting mud or water everywhere Will give you more initial bite.