18" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 19.75] Ceiling the actual front end outer Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

the actual front end outer dimensions are 7" in diameter

+ Product Details Size - 22"w X 22"h X 2"d (for duct opening measurement only)

Actual Filter Size – 7 3/4"w x 29 3/4" x 1"

Applications – The Galvanized Steel Round Take-Off Duct is used for transition from an air plenum or square duct to a round pipe

+ Product Description This aluminum flex duct is intended to be used in heating

18" X 18" Heavy Duty Floor Grille Fixed Blades Air Grille Brown [Outer Dimensions: 19.75 X 19.75] Ceiling the actual front end outer Compatible With Duct 7in Applications This sheet metal DDAG A 1212 the actual front end outer dimensions are 7" in diameter + Product Details Size 22"w X 22"h X 2"d (for duct opening measurement only)