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 border-bottom: 1px solid #eee 4 X 12 Is CRFG2028 Width_14in

border-bottom: 1px solid #eee

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

adds an extra layer of protection

Extra Strong Frame - Our Frames Are The Strongest On The Market

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

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 border bottom: 1px solid #eee 4 X 12 Is CRFG2028 Width_14in border bottom: 1px solid #eee + Product Details Perfect Fit & Easy Sizing Designed for a 18" x 20" OR 20" x 18" duct opening (measured at the opening)