The A.R.E. Deluxe Commercial Units (DCUs) are custom truck caps offered for trucks in a variety of industries including CNG and electric-powered fleets. DCUs can be outiftted with clamp-down, or drop-down locking ladder racks, ladder racks that are built to easily roll the ladder down off the rear, tommy lifts or bumper mounted cranes, and more. A.R.E. has adapted some of its offerings to accommodate CNG fueling options with easy access to the CNG tanks for refilling purposes. These DCUs offer secure, waterproof enclosures to protect tools and equipment, and because they're made of aluminum, they won't rust.