12" X 4" [Duct Opening] 2-Way Horizontal Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 5.75"H] 12" Round Duct Pipe actual front end outer dimensions

actual front end outer dimensions are approximately 32 5/8" width X 36 5/8" height

+ Product Details Size - 24"w X 10"h is the size for the duct opening measurement only

you have 16 different varieties to choose from

+ Product Description Introducing the 8" Radial Damper – Your Solution for Controlled Airflow

+ Product Details Size – 6"w X 10"h is the size for the duct opening measurement only

12" X 4" [Duct Opening] 2-Way Horizontal Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 5.75"H] 12" Round Duct Pipe actual front end outer dimensions+ Product Details Size 12"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 5. 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