Here a slick, quick release, flip open vented cap with a vintage race car look. The cap bolts to a weld-in boss that you can weld on any tank. In cast aluminum with polished stainless hinge arms, with 2 versions: polished stainless or brass pivots & mounting screws.Includes viton gasket. For installation you must order the CNC machined ring with blind holes for steel or aluminum gas tank. Gas cap, as seen on signature bike El Mirage built by Cyril Huze. [1] Visit Pro-Street Cycles for more info.