6" X 16" or 16" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 17.75] Flexible Ducts + Product Details Size -

+ Product Details Size - 4"w X 32"h is the size for the duct opening measurement only

It has crimped ends for easy fitting and secure connection to consecutive duct joints

+ Product Details Size - 16"w X 32"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 24" or 24" x 6" duct opening (measured at the opening)

Built to Last: Reinforced and ribbed design ensures durability and prevents bending under pressure

6" X 16" or 16" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 17.75] Flexible Ducts + Product Details Size -+ Product Details Size 6"w X 16"h or 16" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" width X 17. 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