Tripp lites smartrack srxfanroof is ideal for increasing the ventilation in all rack enclosure server cabinets the unit features 6 208 240v high performance fans mounted in a roof panel and includes toolless mounting hardware built in cable access holes for routing of cables through fan roof panel supports 208 240v 5060 hz ac input compatible smartrack enclosures sr25ub sr25ubkd sr25ubsp1 sr25ubtaa sr42ub sr42ubcl sr42ubexp sr42ubg sr42ubkd sr42ubsp1 sr42ubtaa sr48ub sr48u