2" Billet Aluminum Filler Neck Weld On Screw Cap Small CNC Gas Oil Tank ID 45mm,

ID of insert: 45mm. Suits: Weld on. Radiator Cap&Filler Neck&Plug. Type: Screw on. Oil Tank/Can. Height of cap and insert: 38mm. Cap Material: 6061-T6 Aluminum alloy. Coolant reservoir cap is a great way to give your engine a custom look.