TRIPP LITE's SRSHELF4PSLHD is a heavy-duty sliding shelf for installation in rack cabinets. The SRSHELF4PSLHD has a 28.5 in depth and can support up to 200 lb. This fully extendible shelf can accommodate tower units, monitors and other equipment. It is designed for four-post rack mounting and the required mounting hardware is included. Expandable mounting rails supports installation in racks with front to rear rail distances between 28 in minimum and 46 in maximum.