Pro-Tek RC-400K Black Front Brake Fluid Reservoir Cap Front Brake Fluid Master Cylinder Reservoir Cap in black anodized finish This round bolt-on front brake cap (Pro-tek Part No. RC-400) is 2.10" x .35" and has the word Pro-tek engraved on it twice. It does not come with the two bolts. 100% CNC made from 6061 T6 billet aluminum Replaces only the stock plastic caps