Bedslide BedBin Sliver Upper Tray 58 Inch Model BSA-UK58Bedslide BEDBIN Sliver Upper Tray 58 Inch Model BSA UK58 The BEDSLIDE upper BEDBIN adds an additional 16 x 58 bin that mounts above any BEDSLIDE with a GUARDRAIL or TRAXRAIL kit. The upper BEDBIN provides added storage space for smaller items while still providing full use of your BEDSLIDE deck space. With your new upper BEDBIN you sit at 15 1 2 off the floor of the truck bed allowing you space for items in the bin and still sliding all your items