DuraVent FasNSeal 4" Expandable Universal Concentric Kit mantel-package Features a reflective surface to

Features a reflective surface to amplify the flames

430-Alloy Stainless Steel Outer Casing Size 5"

Napoleon 35" Ascent X 70 Direct Vent Gas Fireplace

Model 060818 Flue Size 8" x 18" Size Width: 7" - 9

DuraVent FasNSeal 4" Expandable Universal Concentric Kit mantel-package Features a reflective surface toAll 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