DuraVent FasNSeal W2 6" 88 Degree 29-4C Stainless Steel Double Wall Elbow deep-rear-shroud Selkirk 4" to 8" Diameter

Selkirk  4" to 8" Diameter

or any other linear design

mentioned in the User Manual

Item Number OPT-5844HKEKIT-BLK-NG UPC Code 196111439713 Manufacturer The Outdoor Plus Brand Name The Outdoor Plus Material GFRC Concrete Collection Rectangular Heiko Finish Black Shape Rectangular Fuel Type Natural Gas Ignition 110V Electronic Ignition Hides Propane Tank No Burner Material 304 Stainless Steel Product Category Fire Pit Dimensions 58

Refractory insulation is encased between walls

DuraVent FasNSeal W2 6" 88 Degree 29-4C Stainless Steel Double Wall Elbow deep-rear-shroud Selkirk 4" to 8" DiameterFasNSeal W2 (double wall) vent lengths and components feature patented built in mechanical locking band and triple lipped directional gaskets. All pipes and components are engineered with smooth clean welds located 90 from mechanical locking bands. This construction feature allows for ease of installation. The air space between the inner and outer wall on FasNSeal W2 helps to reduce the clearance to combustibles in addition to creating a heat shield