Smartrack 4-post Open Frame Rack, 13u, 1000 Lbs CapacityFour post frame racks are ideal for cost conscious 19 inch rack mount applications. Numbered mounting positions take the guesswork out of installing equipment. Self squaring design makes assembly a breeze. Mounting depth can be from 24 to 36 inchesgreat for accommodating deep server chassis. Button holes allow easy, toolless mounting of compatible PDUs and cable managers. Heavy duty, cold rolled steel construction ensures years of reliable use.