DuraVent FasNSeal Flex 9" x 185' Stainless Steel Custom Flex Length yellow ETL certification ensures safe useInstallation

ETL certification ensures safe useInstallation guide

This is the main advantage of double-wall pipes

this medium variety is bigger and chunkier

Reflective/Brass Numbers

DuraVent FasNSeal Flex 9" x 185' Stainless Steel Custom Flex Length yellow ETL certification ensures safe useInstallationMade 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