6" x 6" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 1-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 9" x 9"] 3" Round Duct Pipe Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 31 3/4" x 1"

Actual Front End Outer Dimensions Are 16" Diameter

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 6" Or 6" x 34" duct opening (measured at the opening)

and sound level range of NC 25 to 35

The total outer size of this grille is the listed size plus 2

6" x 6" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 1-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 9" x 9"] 3" Round Duct Pipe 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