The 4" x 10" Steel Floor Register in Matte Black is a vent designed for use with whole house air conditioners and heaters, as well as central air conditioners. Made of steel, this adjustable rectangle-shaped register is 1.5 inches in height but sits flush with the floor and fits a 4" x 10" opening. Its weigh is 14.7 ounces. Its matte black color and compatibility with various brands make it a versatile and functional addition to any home improvement project related to heating, cooling, and air systems.