There is a groove on the back of the part for the HD O-ring gasket

This part is also made with a diameter of 7 ¾ inches

The Navy Seal Retired 7 ¾ inches in diameter combines precision engraving with a premium finish for riders who want their motorcycle to reflect their style

The Command Master Chief 7 ¾ inches in diameter combines precision engraving with a premium finish for riders who want their motorcycle to reflect their style

Navy Chief Skull 7 ¾ inches in diameter Harley-Davidson-Fat-Boy-2018 There is a groove onBillet Aluminum, Chrome Plated Derby Cover This derby cover is 7 inches in diameter. Please check your existing derby cover to confirm that it is 7 inches also. This part is also made with a diameter of 7 inches. Our process is to engrave the design onto a raw aluminum part. The engraved part is then sent to an HD qualified Chrome Plater. After the part has been chrome plated, it is painted using PPG automotive grade enamel. The part is then baked