DuraVent FasNSeal Flex 10" Stainless Steel Coupler plated-steel and round fire pits

and round fire pits

TC18NG (Thermocouple - Natural Gas)

Clearance to Combustible Wall 2" Efficiency (Steady state) NG: 73

Model MOSAIC42IVFS (F0344) Finish Ivory Full Stacked Fireplace Size 42" Compatible Fireplace VRE6042

Crafted with heavier wire construction

DuraVent FasNSeal Flex 10" Stainless Steel Coupler plated-steel and round fire pitsMade 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