24" X 12" [Duct Opening] 2-Way Horizontal Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 25.75"W X 13.75"H] Compatible with Duct 8" + Product Details Size –

+ Product Details Size – 36"w X 26"h is the size for the duct opening measurement only

strong aluminum construction with smooth finished edges for easy and safe use

Actual Filter Size – 31 3/4"w x 21 3/4" x 1"

+ Product Description Introducing the 3-coned supply grille for a T-bar lay-in

24" X 12" [Duct Opening] 2-Way Horizontal Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 25.75"W X 13.75"H] Compatible with Duct 8" + Product Details Size –+ Product Details Size 24"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 75" width X 13. 75" height. High Quality High quality steel with counter sunk screw holes (screws included) and no sharp edges. Equipped with a lever for easy airflow adjustment and dampening. Airflow Control Adjustable airflow lever allows precise control over the direction and volume of air. Installation