Kit Requires A 1 13, 16'' I.D. Hole In The Gas Tank For The Steel Bung To Be Welded In, Vented Gas Cap Pops Up For Easy Removal And Mounts Flush In The Down Position, Steel Bung Is Designed To Be Welded Flush With The Gas Tank, Cap Measures 1 5, 8'' E.D.-Factor. Mn: 80024. Item Weight: 1 Lbs. Suk: Modular-80024 Number Of Items: 1.