Tripp Lite SRSHELF2PTM SmartRack 2U Cantilever Toolless Mount Fixed Shelf (50 lbs /22.7 kgs capacity; 18 in./457 mm Deep)

The 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 rack mounted. The unit supports 50 pounds (22.7 kilograms) with an 18-inch depth.