12 x 12 3-WAY SUPPLY GRILLE - DUCT COVER & DIFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades

12w x 12h opening (vent hole) dimension - actual size is approx 2 wider. The back blades are from black plastic to reduce air noise and visable appearance. Also the back blades are Opposing not overlapping to better control damper and superior air dispersion. But they are also the most visible representation of you air system. Metal-Fab grilles and registers give you an extra measure of quality that you can point out to your family members and house guests. Some of our best features aren?t readily apparent but you?ll appreciate the benefits over a long period of time. Metal-Fab has a high standard of design production and finish on all products. Every part is hand inspected for quality before it is packaged no exceptions. No Sharp Surface Edges. Just run your finger along SKU:ADIB006J2VF48