Aprilia SL1000 Falco RSV1000 R Mille Gold Front Rear Clutch Reservoir Caps Made of Heat Treated (Billet) Aluminum [6061-T6]. Manufactured using 100% CNC Machining No Casting or Molding are involved in the Manufacturing Process Finished with Anodize Coating These caps feature built-in air pressure release vents This listing comes with: (1) Front Brake Reservoir Cap (1) Clutch Reservoir Cap (1) Rear Brake Reservoir Cap