Spectre's Master Cylinder Covers are designed to provide a show quality cover for your brake master cylinder. This cover is made from triple chrome-plated steel, and features a single bail attachment. Measuring 3 inches by 5-5/8 inches, this OEM replacement is intended for use with the stock gasket. Spectre s Master Cylinder Covers are designed to provide a show quality cover for your brake master cylinder. This cover is made from triple chrome-plated steel; and features a single bail attachment.