Thule 422 Xsporter Truck Cargo Roof Rack (Full Size) 450 lb. Load capacity, aluminum construction 2 height adjustable load bars- low position- easy bed level loading, high position- secure long loads up high Easy to install with no drilling, versatile load bars accommodate Thule carriers Includes 5" height adjustable load stops, 4 locks cylinders Two sizes available, refer to Fit Guide for recommended application