10"w X 10"h [Duct Opening] 4-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 11.75"H] w12h12 Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 31 3/4" x 1"

Designed for optimal air flow and lasting durability

Each grille is securely shrink-wrapped with a cardboard backing to prevent damage during shipment

actual front end outer dimensions are approximately 22 5/8" width X 12 5/8" height

Actual Filter Size – 21 3/4"w x 17 3/4" x 1"

10"w X 10"h [Duct Opening] 4-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 11.75"H] w12h12 Actual Filter Size – 23+ Product Details Size 10"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" width X 11. 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