Stamped Face Style Return Filter Frame Stylish grille for ceiling return air. Steel construction. Vanes are fixed. Face opens on hinges to allow filter access. Built in lever style latches close firmly, no knobs to lose. Color-White. NOTE - Filter frames are measured by the filter that they hold. FOR INSTANCE, if you have a filter that measures 19-3/4" x 19-3/4" you would order a 20 x 20 filter frame. It will hold the filter and fit into a ceiling recess of about 20-1/2" x 20-1/2". The frame will cover a hole up to 22-3/4" x 22-3/4".