18" X 24" Or 24" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 25.75] 12" Diameter while also preventing air leakage

while also preventing air leakage making your HVAC system more energy efficient and in turn

+ Product Details Size - 10"w X 20"h X 2"d (for duct opening measurement only)

75" width X 14

Compatibility: Compatible with Duct 10"

+ Product Details Size & Compatibility – The 5" Galvanized Sheet Metal 90 Degree Oval Vertical Angle Elbow is compatible with Duct 5"

18" X 24" Or 24" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 25.75] 12" Diameter while also preventing air leakage+ 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