8" x 8" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 2-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 11" x 11"] Height_24in Low Performance: Clean or replace

Low Performance: Clean or replace the filter if applicable

+ Product Details Size - 12"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 4"h X 12"h is the size for the duct opening measurement only

providing a perfect balance of strength and weight

8" x 8" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 2-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 11" x 11"] Height_24in Low Performance: Clean or replace+ 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