DuraVent FasNSeal Flex 8" 29-4C Stainless Steel Coupler w17.25 Included in that set is

Included in that set is the heavy and durable refractory cement construction

OA10132 Glass Ash Lip

3-Part Specifications

The Emerson 48ST  is a slim 48″ wide See-Thru gas fireplace that is just 9″ deep

DuraVent FasNSeal Flex 8" 29-4C Stainless Steel Coupler w17.25 Included in that set isMade 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