18" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES tool bag } + Product Details Size SV2414 HP Product Details Perfect Fit 12" Round Duct Pipe

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

+ Product Details Size & Compatibilty - The 8" to 7" round metal pipe reducer & increaser 30 gauge is compatible with duct 8" to 7"

Hinges on the top and bottom

Applications – The boot register angle is used for the right-angle transition from a round pipe or insulated flexible duct to a register or grille

18" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIRFLOW LINEAR BAR GRILLES tool bag } + Product Details Size SV2414 HP Product Details Perfect Fit 12" Round Duct Pipe } + 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 20"w X 22"h is the size for the duct opening measurement only