18" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES tool bag + Product Details Size - LO246 Product Details Size 32 Compatible with Duct 4"

+ Product Details Size - 20"w X 22"h is the size for the duct opening measurement only

} + Product Details Size & Compatibility - The size of a boot register end is 12" X 6" X 7" galvanized floor boot end center 26-gauge

+ Product Details Size - 32"w X 36"h is the size for the duct opening measurement only

Hinges on the top and bottom

18" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIRFLOW LINEAR BAR GRILLES tool bag + Product Details Size LO246 Product Details Size 32 Compatible with Duct 4" + Product Details Size 20"w X 22"h is the size for the duct opening measurement only } + Product Details Size & Compatibility The size of a boot register end is 12" X 6" X 7" galvanized floor boot end center 26 gauge