Selkirk 3" to 8" Firestop Spacer (Round - Type B Gas Vent) btu5118 (E) - Top Width -

(E) - Top Width - 64"

And for your added safety

Weight:  14

Invicta Symphonia Stove Comparison Chart

(NG Efficiency) Weight* Hi Low 32-1/2” H x 36” W x 15” D

Selkirk 3" to 8" Firestop Spacer (Round - Type B Gas Vent) btu5118 (E) - Top Width -Selkirk 3" to 8" Firestop Spacer Used to protect combustible materials where pipe passes through a ceiling or wall. Extended bottom flange. (RV) Round Type B Gas Vent Model RV Double Wall Gas Vent is the installer's choice for residential, industrial and light commercial applications. The aluminum liner heats up quickly to promote strong draft. Galvanized outer provides protection against outdoor elements. Product line includes DWC Double Wall