12"w X 6"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 7.75"H] (Copy) d + Product Details Size –

+ Product Details Size – 16"w X 22"h is the size for the duct opening measurement only

Optional Butterfly Damper Available At Asin: B007CNEL1W

length fitting 5/8 in

compatible with duct 4" | 5 in a pack - 4 inch diameter pipe – 10 foot length when connected – 30 gauge thick & made of thick & durable galvanized sheet metal

3/8” - 4223 PSI

12"w X 6"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 7.75"H] (Copy) d + Product Details Size –+ Product Details Size 10"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" width X 7. 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