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 - 24"w X 20"h X 2"d (for duct opening measurement only)

+ Product Details Size – 28"w X 18"h is the size for the duct opening measurement only

Compatibility: Compatible with Duct 7"

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

Actual Filter Size – 35 3/4"w x 27 3/4" x 1"

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