DuraVent FasNSeal W2 12" 316L Stainless Steel Double Wall Insulated Wall Thimble With AVL Pipe d18.25 but this one is different

but this one is different

upgrade to the Quartz Platinum

5" Base OD 16" x 16" Top Opening 10" Diameter Weight 102 lbs

9 g/kg Burn Rate >5 kg/h (>11 lb/h) High-Efficiency Certified Appliance Low Mass Maximum Log Length 20" Log Positioning Loading over width Chimney Diameter 8" Type Of Chimney CAN/ULC S629

enabling you to choose from eco-friendly

DuraVent FasNSeal W2 12" 316L Stainless Steel Double Wall Insulated Wall Thimble With AVL Pipe d18.25 but this one is differentFasNSeal 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