DuraVent FasNSeal W2 4" 88 Degree 29-4C Stainless Steel Double Wall Elbow w75 This fan has a 4-blade

This fan has a 4-blade steel propeller

Sold separately

Available in two sizes

Includes four high-quality tools

Available in Ethanol

DuraVent FasNSeal W2 4" 88 Degree 29-4C Stainless Steel Double Wall Elbow w75 This fan has a 4-bladeFasNSeal 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