8" X 8" [Duct Opening] 4-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"H X 9.75"H] Supply Grille + Product Details Size -

+ Product Details Size - 18"w X 34"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 32 5/8" width X 34 5/8" height

+ Product Description Secure your thermostat with the heavy-duty Beige Metal Thermostat Guard

actual front end outer dimensions are approximately 12 5/8" width X 38 5/8" height

8" X 8" [Duct Opening] 4-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"H X 9.75"H] Supply Grille + Product Details Size -+ Product Details Size 8"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" width X 9. 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 Location