Tripp Lite's SRSHELF2PTM allows you to add a shelf to a 4-post rack to accommodate tower UPS systems, monitors or any other equipment that is not rackmounted. The unit supports 50 lb with an 18-in. depth. For peace of mind, the SRSHELF2PTM comes with a 5-year warranty.Form Factor: Rack-mountableColor: BlackMaterial: Cold-rolled Steel (CRS)Maximum Weight Capacity: 22.68 kgHeight: 3.5Width: 19"Depth: 18"Rack Height: 2URack Width: 19"Weight (Approximate): 5 lbGreen Compliant: YesGreen Compliance Certificate/Authority: RoHSLimited Warranty: 5 Year"