12" x 12" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 2-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 15" x 15"] Width_24in + Product Details Size –

+ Product Details Size – The size of 5" straight saddle stick on take-off is 7"/10" and it is compatible with duct 5"

The sling comes with carabiners to easily remove when necessary

actual front end outer dimensions are approximately 30 5/8" width X 20 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 26" OR 26" x 30" duct opening (measured at the opening)

+ Product Details Size – Sheet metal duct board take off start collar is 16" and it is compatible with duct 16"

12" x 12" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 2-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 15" x 15"] Width_24in + Product Details Size –+ 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