Selkirk Corporation 4748 Heat-fab Increaser 7 Inch (m)crimped-8 Inch (f) 304-alloy

Heat-Fab 4748SS Saf-T Liner 304 Collection Rigid Liner Stainless SteelYou may also like Bernard Dalsin Mfg. Co. Insul-Flue 6 Inch SDV Wall Unit for double wall pipe.