HP server rack is the XRackPro2 from GizMac Accessories. XRackPro HP server rack reduces noise and filters incoming air. The HP server rack XRackPro can reduce noise up to 80%. Incoming air of the server rack for HP computer equipment is filtered to reduce maintenance and down time. The XRack HP server rack is available in gray or black colors. 25U, 12U, 6U and 4U HP server racks are manufactured. Additional information on HP server racks can be found at http://www.xrackpro.com/HP-Server-Rack-s/25.htm