Our 170 series is a Return Air Grille used for sidewall or ceiling openings. Our product is constructed to ensure maximum airflow and compliment your home decor. Using our return air grille to outfit your ventilation system will improve your home air circulation. This product is powder coated white and made of high quality steel. Product features: Stamped steel construction, 1/2 in. blade spacing, countersunk screw holes, pristine white powder coat finish.Allows air to flow freely between your ventilation system and a roomMade of high quality steelWhite powder coat finish1/2 in. blade spacing