1000 lb capacity. 75% of the Cargo Tray Length Slides Out. Sturdy steel frame construction. Real plywood Deck with a TPO rubber laminated surface for strength and durability. 6 Industrial Cam Follower Needle and Ball Bearings provide Dependable Lasting support for the Cargo You Haul in Your CargoGlide. Industrial 4 in. high extruded 6061-T6 Thick Aluminum Side Rails with integrated Full Perimeter Tie-Down Tracks and 4 Infinitely Adjustable Eyebolt Tie-Downs to make securing cargo easy and versatile. The OUTSIDE dimensions for this unit are 41 in. long and 48.25 in. wide. The INSIDE Deck surface is 40 in. long and 47 in. wide. Total Deck Height is 3.75 in. Comes fully assembled for easy installation by 2 people.