19" Vented Sliding Server Cabinet Shelf with Adjustable Depth. This adjustable depth sliding server shelf offers an easy way to install non-rackmountable equipment in a server cabinet or open server rack. The shelf features a highly ventilated cold-rolled steel shelf on two locking adjustable rails that allow the shelf to be installed in a closet or rack with a minimum mounting depth of 510mm (20 inches) to a maximum depth of 38.346 in. The locking feature locks the shelf 3/4 of the way out, preventing the shelf from accidentally falling off the shelf or sliding again before maintenance is completed.