EZ-FLO 18 in. x 18 in. Steel Return Filter Grille

EZ-FLO's 18 in. x 18 in. Return Air Filter Grille is used for sidewall or ceiling installation. The all steel construction and powder coated finish makes this diffuser a long-lasting, durable choice. The included hardware makes for a quick and easy installation. EZ-FLO's Return Air Filter Grille will ensure maximum airflow. Outer measurements are 20-11/16 in. x 20-11/16 in.