18" X 24" Or 24" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 25.75] w4h4 Actual Filter Size – 35

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

+ Product Details Size & Compatibility – The size of sheet metal pipe is 10" round x 48" long

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 36" OR 36" x 28" duct opening (measured at the opening)

+ Product Description Enhance your ventilation system with our high-quality grilles and registers

The bridge socket product is specifically designed to cover line sets that run over slightly uneven surfaces

18" X 24" Or 24" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 25.75] w4h4 Actual Filter Size – 35+ Product Details Size 18"w X 24"h or 24" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" width X 25. 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