Specs for 75% Extension: 150 lbs. 1500 lb Payload System Dimensions: 80.1"L x 48.7"W x 5.5"H Tray Dimensions: 76.3"L x 45.3"W x 4.2" Extension: 75% Specs for 75% Extension: 366 lbs. 1500 lb Payload System Dimensions: 80.1"L x 48.7"W x 13.6"H Tray Dimensions: 76.3"L x 45.3"W x 5.6" Extension: 100% Powder-coated American steel frame. Industrial 0.75" plywood deck. Thermoplastic top sheet. Aluminum sidewall. Tailgate Clearance: Some tailgates don't lay flat when open, which can interfere with the operation of the CargoGlide tray. Follow install instructions and check fitment before installing. All CargoGlide models include integrated tailgate clearance or 2 adjustable height positions. CargoGlide comes pre-assembled, so all you'll need is 30-45 minutes, a few tools, and a buddy to help. Don't forget the instructions. Compatible with Spray-In Bed Liners. Not Compatible with: Decked Drawer System, Stepside/ Flareside, Bedrug/Drop-In Plastic Bed Liner, Service Body, 5th Wheel/Gooseneck, Decked Tool Box, Rambox, Some Composite Beds (unless installed with Drawer) and All Legacy Drawer Systems.