4" X 18" Or 18" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 19.75] w14h14 + Product Details Size &

+ Product Details Size & Compatibility – The size of galvanized sheet metal straight floor boot is 10" X 6" X 4"

100% Satisfaction Guaranteed – Don’t worry you’re covered by our 100% money back guarantee no questions asked

Compatibility: Compatible with Duct 7"

Adjustable airflow control – Adjustable airflow control: The system allows users to customize the amount of air supply

Windows - Universal Weather/Air Sealer

4" X 18" Or 18" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 19.75] w14h14 + Product Details Size &+ Product Details Size 4"w X 18"h or 18" x 4" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 75" width X 19. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation. Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully