5" To 6" DuraVent DuraBlack Increaser - 5DBK-X6
This increaser is used to increase from a smaller appliance flue outlet (5") to a larger diameter chimney or stove pipe (6"). Measures 7" long.
WARNING: Carcinogens: This product can expose you to chemicals including Lead, which is [are] known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.