12" X 12" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 13.75"H] Aluminum Adjustable Curved Blade [Outer Dimensions: 10

[Outer Dimensions: 10

this thermostat guard is compatible with most standard thermostat models

Universal Fit – Measures 6" wide x 3-1-13/16" high x 3-1/8" deep

actual front end outer dimensions are 13" Width X 13" Height

12" X 12" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 13.75"H] Aluminum Adjustable Curved Blade [Outer Dimensions: 10+ Product Details Size 12"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 13. 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