Manufactured in polished aluminium to mount to a threated ring what can ordered optional in aluminium or steel to weld or laminate into any fueltank.
Operated by a spring loaded push button let the cap flip up. 2 rubber gaskets to seal the cap and the complete unit against the ring are included. Cap is ventilated.
The 2,5" size is the usual pattern for motorcycle fuel tanks. The 2" is for oiltanks and smaller bikes, but still wide enough for any gasstation filler pistol.