cylinder caps with Eur standard, America standard size: W80-11, 3-1/2 X 8 W95-11, 3-1/2 X11 cylinder caps with Eur standard, America standardsize: W80-11, 3-1/2 X 8 W95-11, 3-1/2 X11Surface: plastic powder plating, Galvanized plating sell cylinder caps and neck rings