The White Register 12x6 Duct Opening with 13 5/8x7 5/8 stamped steel sidewalls is a rectangular vent designed for heating and cooling systems. Made by the brand Selkirk in the United States, this vent features steel construction and measures 12 inches in height and 6 inches in width. Its white color adds a clean and modern look to any ceiling or wall. This product is a reliable and durable option for improving ventilation in your home or garden.