Another level has been raised in the sump of Beans Diesel/Bean Machine's tank 6061 Billet aluminum is used to make this... moreAnother level has been raised in the sump of Beans Diesel/Bean Machine's tank 6061 Billet aluminum is used to make this product, which is built to last and is extremely easy to install. Install is as simple as it gets, requiring only a 3" hole and a single bolt, just like their original and groundbreaking design.