Our Lone Star Racks 42U Seismic Rack Cabinet is compatible with any EIA 19” standard rack equipment. It has a height of 42U and a width of 600 mm. Inside the rack includes two tool-less PDU cable trays for cable management. Both front and rear doors are lockable, removable, and reversible. The doors are also perforated allowing optimum airflow. The Lone Star Racks seismic rack is a 4 post enclosure that meets the Telcordia GR-63-CORE Network Equipment & Building Systems (NEBS) requirements for Zone 4 Seismic Earthquake Environments.The rack is constructed in 16 gauge steel. Each rack has a weight capacity of 3,000 lbs.