Tripp Lite's SR4POST13 SmartRack 4-post open frame racks are ideal for cost conscious 19 inch rack mount applications. Multiple units can be bolted together side by side. The SR4POST13 is constructed of black steel with square, numbered mounting holes and has toolless button holes to accept PDUs or cable managers. SR4POST13 supports 1000lbs of rackmount equipment and is easily assembled. Adjustable mounting depth (22 to 36 inches)