This kit creates a full size rack on truck canopies/camper shells/caps and trailers that have roof top sizes of approximately 1165mm/45.9″ (W) x 1156mm/45.5″ (L). The Slimline II Tray mounts to supplied Feet that slide in to the supplied Track. The track can be easily mounted to your canopy/shell or trailer. See the Track installation instructions in the INSTALL tab for further details. This taller kit has space for mounting the Front Runner Camp Tables or other compatible accessories under the rack.