StarTech.com 4U Blank Panel for 19 inch Rack, Enclosures & Cabinets, Rack Mount Blanking Panel for Server/Network Racks, 4RU Rack Filler - 4U blank panel will fit 19 inch network/server racks/cabinets - Incl. 2 sets of M6 cagenuts/screws to mount spacer/filler - Width: 19in, Height: 4U (7in) - Blanking panel made with 1.2mm thick cold rolled steel - Promotes airflow - Lifetime Warranty