This Rack Kit is for truck canopies/camper shells/caps and trailers that have roof top sizes no larger than approximately 1345mm/53'' (W) x 1358mm/53.5'' (L). The Slimline II Tray and four (4) supplied Feet mount onto the OEM/Factory installed track of your canopy/shell or trailer.NOTE: Additional fasteners may be required to fit OEM/Factory supplied tracks.All Front Runner Rack Kits contain installation instructions as well as all the components needed to mount the Slimline II Tray to your vehicle.In order for Front Runner Feet and supplied hardware to work with your OEM/Factory supplied canopy track, the track must have: Slot base width min 20mm / max 25mm Slot base height min 6.5mm / max 10mm Slot opening width min 8.5mm / max 10.5mm Slot opening height min 2mm / max 5mm **Please check with canopy manufacturer regarding the load ratings for your specific canopy and track.All Front Runner Racks are backed by a Limited Lifetime Warranty*