20" X 6" [Duct Opening] 2-Way Vertical Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 21.75"W X 7.75"H] w12h12 + Product Details Size -

+ Product Details Size - 32"w X 28"h is the size for the duct opening measurement only

this thermostat guard is compatible with most standard thermostat models

actual front end outer dimensions are approximately 18 5/8" width X 32 5/8" height

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

Universal Fit – Measures 3-7/8" wide x 3-1/2" high x 3" deep

20" X 6" [Duct Opening] 2-Way Vertical Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 21.75"W X 7.75"H] w12h12 + Product Details Size -+ Product Details Size 20"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 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