A premium quality locking filler cap made from anodised 6082 Aluminium Alloy. It has a 4 inch bolt circle with 8 countersunk stainless steel fixings, and is made in England.

The hardest part in mounting this cap to a T3 bus is the body aperture and the angle of the filler neck above and behind the front wheel. Using a straight funnel type adapter often leads to complications and hence modification of the surrounding bodywork and filler neck.