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

The SeaBee Deluxe - TC Derby Cover combines precision engraving with a premium finish for riders who want their motorcycle to reflect their style

This derby cover is 7 ¼ inches in diameter

The Tech Sergeant-04BD

The American Flag 1- TC Derby combines precision engraving with a premium finish for riders who want their motorcycle to reflect their style

2nd Army ID 7 ¾ inches in diameter Harley-Davidson-CVO-Ultra-Classic-Electra-Glide-2010 There is a groove onThe 2nd Army ID 7 inches in diameter combines precision engraving with a premium finish for riders who want their motorcycle to reflect their style, service, or personal story. Product Details Billet 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