. The UNIRAILS1U 1U Fixed 19-inch Adjustable Depth Universal Server Rack Rails enable you to fit non-rack mountable equipment (weight up to 25kg/57lbs.) into a standard 19-inch rack. Featuring sturdy cold-rolled steel construction adjustable depth configurations for varying rack sizes horizontal equipment supports & multiple mounting hole patterns to secure your equipment this durable 19 rack rails kit makes mounting your non-rackmount equipment quick & easy! Universal design mounts to almost any 19 server or other equipment for maximum mounting versatility Three-piece rail construction allows for a wide range adjustable depth configuration to accommodate almost any size of rack Cross bars allow for mounting of equipment that can't span the 19 rack expanse..