18" X 6" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 19.75"W X 7.75"H] White + Product Details Size -

+ Product Details Size - 20"w X 12"h is the size for the duct opening measurement only

Crafted from robust 20-gauge steel

+ Product Details Universal Fit - Accommodates almost any thermostat with dimensions of 8-1/4" H x 5-3/8" W x 3-1/2" D

+ Product Details Size – 8"w X 16"h is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 5 3/4" x 1"

18" X 6" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 19.75"W X 7.75"H] White + Product Details Size -+ Product Details Size 18"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 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