The ADJSHELFHDV 1U Adjustable Heavy Duty Vented Rack Mount Shelf lets you add a high-capacity, adjustable 1U shelf to virtually any standard 19-inch server rack or cabinet. This heavy duty rackmount shelf can be adjusted from 19.5 inch to 38in (mounting depth) to fit your rack, while the vented design improves air flow and help to lower temperatures in the rack. Constructed using 1.2mm SPCC commercial grade cold-rolled steel, providing the ability to hold up to 113kg (250lbs) of equipment - a durable solution for storing large, non-rackmount pieces of equipment, heavy tools or peripherals in your rack or cabinet. Backed by a StarTech.com Lifetime warranty. Heavy duty server rack shelf provides the ability to hold up to 113kg (250lbs) of equipment. Adjustable mounting depth brackets make it simple to add a storage shelf to a wide variety of racks or cabinets. Vented server rack shelf improves air flow and helps lower temperatures in the cabinet. Adding a storage shelf to shallow depth network switches/equipment racks. Supply additional storage space for heavy, mission critical hardware and non-rack mount equipment. For use with all 19 wide Server Racks and Cabinets.