20 X 16 (Duct Opening Size) Air Return Filter Grille Stamped Steel Face (Color-White) Stamped Face Air Return Filter Frame 20X16 Stylish grille for ceiling return air. Face opens on hinges to allow filter access. Vanes are stamped in the steel and fixed. Steel construction. Color-White. Built in lever style latches close firmly, no knobs to lose. Covers 20" x 16" opening. Register face is 21-3/4" x 17-3/4".