Tecmojo 3U blank panel vented spacer is designed to control and improve airflows around rackmounted equipment in your network and server enclosures. It fits in most standard 19-inch server racks, enclosures and cabinets. The spacer features heavy duty steel for strength, protected with a black electro -static powder coated finish for durability and offers a seamless look on your cabinet and rack fronts. Simply mount the spacers to your rack using the hardware included. Compliant with EIA/ECA-310 standards. Available in a variety of sizes.