DuraVent FasNSeal Flex 12" x 190' Stainless Steel Custom Flex Length natural-gas-to-lp Diameter: 23

Diameter: 23

Never move the fireplace while lit

Product Code Part No Size 4DT-UPPSAL 1604840 4-Inch

UL Design Certified to ANSI Z221

DuraVent FasNSeal Flex 12" x 190' Stainless Steel Custom Flex Length natural-gas-to-lp Diameter: 23Made from super ferritic stainless steel. Corrosion resistant. Manufactured with a sure seal locking seam for superior strength and flexibility. The smooth inner wall provides for no output reduction, allowing for full appliance efficiency, ease of cleaning and regular maintenance. The smooth inner wall optimizes gas flow, minimizes back pressure, and facilitates condensate management. Only flexible chimney liner listed to UL 1738 standard. What's