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 actual front end outer dimensions

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

Actual Filter Size – 24 3/4"w x 33 3/4" x 1"

+ Product Details Size & Compatibility – The size of galvanized sheet metal straight floor boot is 12" X 6" X 5"

Working temperature from -40℃ to 120℃

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

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 actual front end outer dimensions+ 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