12 x 4 Inch Solid Copper Floor Register With Damper (Satin Nickel Finish) - this floor register is made from solid copper with a stylish hand hammered textured. It features an adjustable powder-coated steel damper for easy airflow. The damper measures 12 inches long by 4 inches wide and fits like vent openings. The front plate measures 13 inches long by 5 inches wide. This style of floor register is shown in a Satin Nickel Finish and it comes in several other finishes.