Brass Spinner Motorcycle Oil Plug is a direct replacement for your Harley oil plug used on all Evolution and Twin Cam Softail models. Of course these chopper parts can fit bobbers and most custom motorcycles using the same type of oil tank. Head is made out of billet brass, while dipstick is stainless steel. Two o-rings prevent leaking. Looks great alone or combined with our Brass Spinner Chopper Custom Gas Cap for Weld-In Tanks, Brass Spinner Custom Gas Cap for Stock Tanks and Wheel Spinner with Brass Studs.