GizMac XR-NRE2-4U XRackPro RackMount Noise Reduction Enclosure Cabinet – This item is NEW old stock surplus. The foam on the bottom has aged and falls apart to the touch. XRackPro 4U is a rackmount enclosure server rack cabinet specifically designed for noise reduction and security. Rackmount computer servers and RAID storage become whisper quiet in this rack system while locking doors protect the equipment at the same time. Solidly built and providing 4U of industry standard 19 Inches (48.2 cm) wide rackmount cabinet space, the second generation XRackPro 4U is an ideal server rack and computer cabinet for Apple (Xserve server and Xserve RAID), Windows Dell, HP, IBM, etc. , Linux, Sun, SGI and other PC computer rackmount servers and storage.