DuraVent FasNSeal Flex 10" x 85' Stainless Steel Custom Flex Length h18.88 This universal part covers 2

This universal part covers 2 diameters

Do not cover the stainless steel burner with lava rocks

Once the mounting bar is set

Brand DuraVent Series FasNSeal Model FSTC6B Product Type Tee Cap

Selkirk 4" to 8" Reduction Tee

DuraVent FasNSeal Flex 10" x 85' Stainless Steel Custom Flex Length h18.88 This universal part covers 2Made 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