Tripp Lite SRSHELF2P Rack Enclosure Mount Cabinet Cantilever Fixed Shelf 60lb Capacity 2URM Fixed Shelf, 2U Cantilever mount 2 or 4 post rack compatible 18 inch shelf depth Cold rolled steel with black finish Required mounting hardware included Fixed Shelf, 2U Cantilever mount. Required mounting hardware included 2 or 4 post rack compatible 18 inch shelf depth Cantilever vented shelf supports monitors and other equipment Cold rolled steel with black finish Use two shelves back to back to create a deep fixed shelf in 2POST racks