This Showgear Sliding Rack Mount Shelf is a 19" wide and 1U high vented sliding shelf that promotes a good ventilation. It can be used for multiple uses and locations. For example you can use it as cabinet sliding shelf and sliding computer tray for on-stage, in a studio or network installation. This Rack Mount Shelf is universally compatible, meaning that it could be used in any 19" rack case or network cabinet, like our Showgear FSM, FSG, WMF and WMH series.