8" x 8" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 3-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 11" x 11"] 12" Round Duct Pipe ensuring optimal circulation throughout your

ensuring optimal circulation throughout your space

Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 4" duct openings

actual front end outer dimensions are approximately 26 5/8" width X 20 5/8" height

There are many possible causes for these

Actual Filter Size – 35 3/4"w x 11 3/4" x 1"

8" x 8" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 3-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 11" x 11"] 12" Round Duct Pipe ensuring optimal circulation throughout your+ 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