Aston classic fuel filler caps have been used on race and road cars for decades, from Mini Coopers to AC Cobras.The timeless design looks equally as good on modern cars as they do on classics, and with a range of sizes and fitting flanges available, it is possible to adapt an Aston cap to fit most vehicles. Available in polished alloy or chromed finish the Aston cap has a female threaded base to screw onto an optional collar or flange (not included). A number of gaskets are supplied to enable the cap to be positioned in the correct orientation when screwed on tight.The quick release catch has been simplified over the years to satisfy safety requirements, however the 3.5 inch cap is available with the original style roller catch if you require an authentic look. Aston filler caps are suitable for use on fuel filler necks, oil tanks, water tanks and rocker covers.