Pro-Tek RCK-35B Blue Front & Rear Brake Fluid Master Cylinder Reservoir Caps Front and Rear Brake Fluid Master Cylinder Reservoir Cap Set in matching blue anodized finish This round threaded front brake cap (Pro-tek Part No. RC-100) is 2.25" x .50" and has the word Pro-tek engraved on it twice This rectangular bolt-on rear brake fluid cap (Pro-tek Part No. RC-800) is 2.00" x 1.25" and has the words Pro-tek Racing engraved on it. It does not come with the two bolts. 100% CNC made from 6061 T6 billet aluminum Replaces only the stock plastic caps