Pro-Tek RC-450R Red Rear Brake or Clutch Fluid Master Cylinder Reservoir Cap Rear Brake or Clutch Fluid Master Cylinder Reservoir Cap in red anodized finish This round threaded rear brake or clutch cap (Pro-tek Part No. RC-450) is 1.50" x .40" and has the word Pro-tek engraved on it twice 100% CNC made from 6061 T6 billet aluminum Replaces only the stock plastic caps