New Billet Aluminum Easy Fill Fuel Cell Cap w/12 Bolting Holes Cell Bung Black. Material: CNC machined from 6061 billet aluminum. bolt holes. 1x Fuel Cell Cap Flush Mount Kit. 【Easy To Installation】 : Equipped with the rubber ket you need, the original accessories are plastic, easy to wear or aging, short life, replace our upgraded products with more durability and better performance.