DuraVent FasNSeal 3" x 4" 29-4C Stainless Steel Stepped Increaser 26in the XL900 burner delivers a

the XL900 burner delivers a stunning linear flame to be use with BX2(Decorative Box with Both Sided) model

drilling at least 1” into the wall at the same time

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DuraVent FasNSeal 3" x 4" 29-4C Stainless Steel Stepped Increaser 26in the XL900 burner delivers aAll 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