DuraVent FasNSeal W2 3" x 4" 29-4C Stainless Steel Double Wall Tapered Increaser btu23500 021" Galvalume Steel (Size) Inside

021" Galvalume Steel (Size) Inside Diameter 7" Length 18" A 7" B 9" Technical Dimensions

Smooth and thickened MDF board with premium moisture resistance is durable and easy cleaning spending many years of time with you

High-quality aluminum ensures stability and durability

Hybrid-FXTM Flame Technology

DuraVent FasNSeal W2 3" x 4" 29-4C Stainless Steel Double Wall Tapered Increaser btu23500 021" Galvalume Steel (Size) InsideFasNSeal 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