DuraVent FasNSeal 9" 30 Degree 316L Stainless Steel Elbow d16.97 This square stack is specifically

This square stack is specifically designed for fire pits with a square shape

extended range of gas-fired unit heaters

The log grate and 6 small holes in the fire bowl make the air circulation better

25 lb needed for 28" gas burner insert

DuraVent FasNSeal 9" 30 Degree 316L Stainless Steel Elbow d16.97 This square stack is specificallyAll FasNSeal (single 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