4" X 20" Or 20" X 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 21.75] Width_20in Installation Location – sidewall and 14" Round Duct Pipe FR M 414 White For 10 duct opening

Installation Location – sidewall and ceiling

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 16" OR 16" x 24" duct opening (measured at the opening)

Heavy Gauge Steel – Heavier gauge than needed

+ Product Details Size - 40"W X 4"H is (for duct opening measurement only)

Applications – The product is used for stopping all types of fittings and also used to terminate a rectangular duct run in an HVAC application with a rectangular duct cap

4" X 20" Or 20" X 4" Heavy Duty Floor Grille Fixed Blades Air Grille Brown [Outer Dimensions: 5.75 X 21.75] Width_20in Installation Location – sidewall and 14" Round Duct Pipe FR M 414 White For 10 duct opening Installation Location – sidewall and ceiling + Product Details Perfect Fit & Easy Sizing Designed for a 24" x 16" OR 16" x 24" duct opening (measured at the opening)