Round Stack Boot 10" X 3.25" X 7"- is Compatible with Duct 7" 4" Round Duct Pipe + Product Details Size –

+ Product Details Size – 16" X 16" is the size for the drywall opening measurement only

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this diffuser is both functional and aesthetically pleasing

The "W" Shaped Pleats Give You More Filter Surface Thereby Capturing More Dust

+ Product Details Size - 10"w X 36"h is the size for the duct opening measurement only

Round Stack Boot 10" X 3.25" X 7"- is Compatible with Duct 7" 4" Round Duct Pipe + Product Details Size –+ Product Details Size The size of a galvanized sheet metal stack boot is 10" 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