Tripp Lite's SmartRack Fixed Heavy-Duty Shelf SRSHELF4PHDTM accommodates tower units, monitors and other equipment. The fixed, heavy-duty shelf offers 25.5 inches of shelf depth and supports up to 250lbs. SRSHELF4PHDTM is designed for 4-post, toolless, rack mounting. - Ideal for adding extra flat surfaces or shelf space in 4-post rack enclosures - Supports a load of up to 250 lb - 25.5 inch shelf depth (fully closed) / 40.75 inch shelf depth (fully open) to accommodate a wide variety of equipment - Vented design increases airflow to sensitive equipment - Heavy-duty, cold-rolled steel construction with black finish - Snap-in toolless mounting - 5-year warranty