Joker Machine Finned Derby Cover For Harley Sportster Make your bike stand out in a crowd with this Joker Machine billet aluminum finned derby cover. Made from billet aluminum and engraved with a fin design with a stunning finish. Features: CNC Milled out of 6061-T6 billet aluminum All custom mounting hardware is included Available in hard black or clear anodize, and chrome finishes Made in the USA