Harley Davidson XR1200 Billet Aluminum Keyless Gas Fuel Petrol Lid Cap in Black Made of Heat Treated (Billet) Aluminum [6061-T6] Because of the increased percentage of Ethanol in todays fuel, we recommend greasing the gas cap gasket with Silicon Based Grease before installation No Casting or Molding are involved in the Manufacturing Process Manufactured using 100% CNC Machining / Finished with Anodize Coating This listing comes with: (1) Base (1) Cap (8) Stainless Steel Bolts (4) Spacers