The unisldshf19h adjustable sliding rack shelf lets you add a vented sliding shelf with cable management into virtually any 4 post server rack or cabinet the adjustable mounting depth design allows the shelf to be installed easily into server cabinets with mounting depths from 294in 7465mm to 318in 807mm the sliding rails also offer a locking mechanism to stop the shelf from sliding out too far or sliding back into the rack before maintenance is complete offering a weig