12" x 12" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 2-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 15" x 15"] Flat Elbow Transition˚ Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 17 3/4" x 1"

Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 8" duct openings

but there comes a point when it needs to be replaced outright

efficient cuts with minimal effort

12" x 12" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 2-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 15" x 15"] Flat Elbow Transition˚ Actual Filter Size – 13+ Product Details Size Refers to duct opening only. The face frame extends roughly 1. 5" on each side. Do not measure the overall grille for sizing. Design All aluminum frame and back blades. Rustproof and built to last in moisture prone environments. Quiet Airflow Opposing blade damper design reduces vibration and noise for smoother air distribution. Clean Finish White powder coated surface resists chips, scratches, and discoloration over time. Easy