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] Color_R-8.0 Pink actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 18 5/8" height

With a 5" diameter for the duct opening measurement

actual front end outer dimensions are approximately 34 5/8" width X 20 5/8" height

this thermostat guard is the perfect solution for safeguarding your temperature controls

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

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] Color_R-8.0 Pink actual front end outer dimensions+ 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