12" X 10" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 11.75"H] 1-Way Actual Filter Size – 29

Actual Filter Size – 29 3/4"w x 31 3/4" x 1"

this flex duct decreases the pressure loss and provides a more hygienic environment

complete with a set of sponge gasket and mounting frame

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actual front end outer dimensions are approximately 38 5/8" width X 10 5/8" height

12" X 10" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 11.75"H] 1-Way Actual Filter Size – 29+ Product Details Size 12"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 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