18" X 24" Or 24" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 25.75] Height_22in + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 28"w X 6"h X 2"d (for duct opening measurement only)

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

Actual Filter Size – 19 3/4"w x 29 3/4" x 1"

Actual Filter Size – 17 3/4"w x 31 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 20" OR 20" x 18" duct opening (measured at the opening)

18" X 24" Or 24" X 18" Heavy Duty Floor Grille Fixed Blades Air Grille Brown [Outer Dimensions: 19.75 X 25.75] Height_22in + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 28"w X 6"h X 2"d (for duct opening measurement only) + Product Details Size – 12"w X 14"h is the size for the duct opening measurement only