Round Stack Boot 12" X 3.25" X 7" round Compatible with 7" Duct 7" Diameter + Product Details Size –

+ Product Details Size – 4"h X 8"h is the size for the duct opening measurement only

actual front end outer dimensions are 8" diameter

actual front end outer dimensions are approximately 18 5/8" width X 32 5/8" height

5" X 8" inch

or diffusers

Round Stack Boot 12" X 3.25" X 7" round Compatible with 7" Duct 7" Diameter + Product Details Size –+ Product Details Size The size of a galvanized sheet metal stack boot is 12" X 3. 25" X 7". It is compatible with duct 7". Design The stack boot at the bottom of the stack allows a transition from an ordinary large round or rectangular duct to a thin wall mounted duct. Applications The straight boot is used for a straight line transition going from round pipe or insulated flex duct to wall stack. Premium Quality Our straight round stack boot is made