The Subzero Engineering Cube cable cutout cover is the most effective way to fill in openings in your raised floor. The Cube comes in a variety of sizes that will cover any opening required. It can be ordered in custom sizes or several standard sizes. The Cube is made of a fireproof material and installation is easy. Simply compress or squeeze The Cube, place into the opening, and release! The Cube will instantly fill in all around the raised floor opening (top, bottom, and side). The Cube is specifically engineered with a 5-1/2″ depth so that it fully separates subfloor and ambient air. The Cube is the most effective way to cover these openings and to not lose cold air. Larger cubes can also be used to create a subfloor wall or baffle. The Cube is an easy and efficient way to manage airflow during data center expansions.