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] Color_R-4.2 Yellow + Product Details Size –

+ Product Details Size – 30"w X 6"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 34"h is the size for the duct opening measurement only

Actual Filter Size – 31 3/4"w x 35 3/4" x 1"

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 4

improves airflow

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] Color_R-4.2 Yellow + 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