6" x 6" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 3-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 9" x 9"] Height_30in you can cut or trim

you can cut or trim your vent cover to more precisely fit your air vent

875" width X 16" height

Actual Filter Size – 29 3/4"w x 25 3/4" x 1"

Enhanced Filtration: Our filters are 25% thicker than competitors'

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

6" x 6" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 3-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 9" x 9"] Height_30in you can cut or trim+ 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