This AmeriFlow® product is intended as a return air filter grille. It is an all steel construction. AmeriFlow® offers stylish grilles, registers, diffusers, and accessories for the retail market. All AmeriFlow® products are quality crafted with the customer in mind to make sure every job goes smoothly. At AmeriFlow®, we offer stylish grilles, registers, and diffusers made from high quality materials and exacting workmanship that feature a durable paint finish. All products have been carefully tested at our facilities, providing efficient, long-lasting performance. AmeriFlow® products are built with the contractors in mind. Wide borders, a large selection of sizes, and easy installation features allow for savings in time and money.