4" x 12" Or 12" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 13.75] Foam Tape + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - The listed 10" diameter refers specifically to the size of the duct opening

thanks to the padded molded handle that offers a comfortable grip

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 36" OR 36" x 24" duct opening (measured at the opening)

+ Product Details Size – 12"w X 14"h or 14" x 12" is the size for the duct opening measurement only

See chart below:

4" x 12" Or 12" X 4" Heavy Duty Floor Grille Fixed Blades Air Grille Brown [Outer Dimensions: 5.75 X 13.75] Foam Tape + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size The listed 10" diameter refers specifically to the size of the duct opening thanks to the padded molded handle that offers a comfortable grip