Access Ladder Racks 4000948 Strong enough to get the job done. Maximize transport potential with the model specific, easy to install ADARAC(TM) Aluminum Pro Series! The fully adjustable and removable vertical uprights are made from corrosion resistant, heavy duty aluminum with limited framework interference for hard tri-fold cover operation and increased cargo capacity. ADARAC(TM) Aluminum Pro Series is built for industrial versatility. ADARAC Aluminum Pro Series Truck Bed Rack System ADARAC Aluminum Pro Series Truck Bed Rack System. For Full Size 1500 6ft. 6in. Box. Access ADARAC Aluminum Pro Series 14+ Chevy/GMC Full Size 1500 6ft 6in Bed Truck Rack