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 Actual Filter Size – 13

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

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

Crafted from robust 20-gauge steel

Smooth Powder Coat Finish: The grill boasts a sleek and smooth powder coat finish that not only adds a touch of elegance to your surroundings but also enhances its resistance against wear and tear

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 Actual Filter Size – 13+ 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