Billet Fuel Cell Cap Assemblies are a unique answer to replacing your existing plastic fuel cell cap. These cap kits are designed as a direct fuel cell cap replacement for any fuel cells with a 12-bolt, 5.343 in. bolt holes. 12 bolt fuel cell cap Clear anodized for a trick look. Come with a rubber gasket for installing the bolt-on flange. This fuel cell filler neck cap is CNC machined from 6061 billet aluminum. CUSTOMER SERVICE:If you have any problem ,please contact us and we will respond you on 24 hours except weekends and holidays. Specifications: I.D.: 3'' Hole: 12 Color: Black Material: CNC machined from 6061 billet aluminum Application:Universal Package Included: 1 x Fuel Cell Cap Flush Mount. (100% Brand New Never Used Or Installed).