Improve the cooling flow & appearance of your racks & cabinets by filling the gaps between equipment. The BLANKB1 1U Rack Blank Panel for 19in Server Racks & Cabinets is designed to EIA RS-310-C specifications & fits all 19" standard server racks & cabinets. Ideal for improving airflow within the rack by covering the unused spaces, the filler panel/blank panel is constructed of cold-rolled steel & features a black powder coated finish that matches most industry standard black server cabinets & racks.