12" x 12" [Duct Opening] Ceiling Supply Diffuser Vent Cover – Corner Direction with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 15" x 15"] return grille Actual Filter Size – 15

Actual Filter Size – 15 3/4"w x 15 3/4" x 1"

max-width: 100%

Actual Filter Size – 27 3/4"w x 11 3/4" x 1"

actual front end outer dimensions are approximately 9" width X 9" height -

+ Product Details Size - The listed 12" diameter refers specifically to the size of the duct opening

12" x 12" [Duct Opening] Ceiling Supply Diffuser Vent Cover – Corner Direction with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 15" x 15"] return grille Actual Filter Size – 15+ 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