The BAKFlip® Contractor Series Pro Tonneau Cover is the combination of the F1 (Fiberglass Reinforced Polymer)and an integrated rack system. The ultimate solution for both storage and cargo management, the CS Pro provides flexible loading features to accommodate a variety of options from construction materials to sporting goods. The rack uprights and crossbars can be installed or removed in minutes offer the ultimate in truck bed versatility. Rack uprights slide in the rails for multiple positions, 1 pair of tie-downs included. Cover weight rating: 500 lbs(evenly distributed) 3 year warranty.