Premium 42U Rack Enclosure Server Cabinet with Doors & Sides -3000lb Capacity. This sale is for a Tripp Lite SR42UB Rack Enclosure Cabinet. Condition: Item is in excellent working and cosmetic condition with minor to moderate wear. Get more from your network rack enclosures! Tripp Lite’s SR42UB is the ideal solution for secure, high-density server and networking applications in IT environments. This premium SmartRackT Enclosure Cabinet is packed with features designed to simplify rack equipment installations and rack equipment maintenance: top-panel cable routing ports, perforated doors to promote efficient airflow, adjustable mounting rails, toolless vertical PDU mounting and others. And as part of the SmartRack family, the SR42UB is compatible with Tripp Lite’s extensive range of rackmount accessories, enabling you to customize your solution to meet any requirement. 42U Rack Enclosure Server Cabinet w/ Doors & Sides. Tripp Lite 42U Rack Cabinet Enclosure SR42UB.