Name:Black Flue Pipe Twin Wall Chimney 250mm 500mm 1000mm 5 in.and 6 in;Product material:Stainless steel 304, 316L;Material thickness:0.5mm-1.0mm;Diameter:6";Surface:Black painted;Usage:Wood Stove/fireplace/heater/burner;Install Type:Spigot System;Fuel t