The EZ-FLO 20 in. x 25 in. Steel Return Filter Grille is a high-quality ventilation accessory designed for easy installation on ceilings or walls. Made of durable steel material, this white grille features a flush mount design for a seamless appearance. With a maximum duct opening length and width of 20 inches, this product is perfect for efficiently filtering air in your home. The EZ-FLO brand ensures reliability, backed by a 1-year limited warranty, making it a trusted choice for improving your indoor air quality.