Selkirk 3" to 7" Low Profile Double Wall Increaser (Round - Type B Gas Vent) Size:4" to 6" Dimensions: 7 Inch x 6

Dimensions: 7 Inch x 6 Inch

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Selkirk 3" to 7" Low Profile Double Wall Increaser (Round - Type B Gas Vent) Size:4" to 6" Dimensions: 7 Inch x 6Selkirk 3" to 7" Low Profile Double Wall Increaser Used to increase pipe diamete. Used for tight installations to optimize space. (RV) Round Type B Gas Vent Model RV Double Wall Gas Vent is the installer's choice for residential, industrial and light commercial applications. The aluminum liner heats up quickly to promote strong draft. Galvanized outer provides protection against outdoor elements. Product line includes DWC Double Wall Connectors and