Access Ladder Racks 4001223 Rugged, strong and built to perform, the ADARAC(TM) Aluminum Series is constructed from heavy duty corrosion resistant aluminum to safely haul a hefty load. For a sleek aerodynamic design, the completely adjustable and removable uprights contour to the cab. Simple to install and ready for anything, the ADARAC(TM) Aluminum Series will easily carry your next adventure. ADARAC Aluminum Truck Bed Rack System ADARAC Aluminum Truck Bed Rack System. For Full Size 1500 6ft. 6in. Box. Access ADARAC Aluminum Series 14+ Chevy/GMC Full Size 1500 6ft 6in Bed Truck Rack