The DuraTech Stainless Steel 60 Chimney Pipe with Carton Filler with 6 Inner Diameter is designed for appliances that are tested and listed for is used with a 2100° F HT chimney system, such as wood stoves, fireplaces, furnaces, boilers, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas.For class a chimney pipe UL ListedCollection: DuraTech Finish: Stainless Steel Fuel Type: Coal, Gas, Oil, Wood Inside Diameter: 6 Length: 60 Material: Galvanized Steel Outer Diameter: 8 Pipe Class: Class A Pipe Shape: Round Style: Functional Vent Construction: Double Wall Weight: 26 Width: 8