All of the support, ventilation, and durability you need in a shelf with an added burst of speed! These 16-gauge steel shelves feature our compact FoldFlat™ design that installs in an instant and is easy to store and transport to the job site. And install couldn't be easier - just flip up the hinged side flaps and mount them into the rack. Simple! Plus the flat-pack design saves on shipping costs and is easier to store in your van or warehouse.