3" Circular Round Plastic HVAC Supply Grille Air Diffuser -Vent Duct Cover [Outer Dimensions: 5"] Ceiling + Product Details Outer dimensions:

+ Product Details Outer dimensions: 19

+ Product Details Size – 20"w X 18"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 14" duct opening (measured at the opening)

Achieve the perfect airflow with adjustable control by rotating the middle disk

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

3" Circular Round Plastic HVAC Supply Grille Air Diffuser -Vent Duct Cover [Outer Dimensions: 5"] Ceiling + Product Details Outer dimensions:+ Product Details Size 3" Diameter is the size for the duct opening measurement only, actual front end outer dimensions are 5" diameter. Design Made of strong durable ABS plastic, will last forever & never rust. Easy removal for cleaning. Airflow Improved airflow dynamics long neck bBody reduced noise design integrated spring fasteners. Easy Installation Just pop the diffuser right into the wall duct hole and the side springs will hold it right into