The Cool Boot® Raised Floor Air Sealing Grommet is designed for hot aisle/cold aisle environments in a data center where cables pass through a cutout in the raised floor. The grommet reduces bypass airflow improving the cooling of network equipment and prevents debris from falling below the raised floor. The raised floor air sealing grommet is 4 inches L x 12 inches W (101.6mm x 304.8mm).