Our Heavy Duty Sliding Rack Shelf has a weight capacity of 235 lbs and a depth of 28”, a mounting depth of 19 - 31" and width of 17.6”. The shelf extends up to 29" on heavy duty, ball bearing slide rails. The Heavy Duty Sliding Rack Shelf is excellent for mounting large severs or other normally not rackmountable equipment such as PC towers, large printers, and UPS towers. The shelf includes 2 adjustable equipment stops and 2 anti slip mats. This shelf model also includes a cable management arm to professionally route and secure equipment cables.