The DVL 8 Oval to 6 Round Double Wall Stovepipe Adapter is a component that is used in a typical venting installation. Use on Vermont Casting appliances with oval flue collars to adapt to round pipe.For 8 Oval to 6 Round Pipe Use on Vermont Casting AppliancesFuel Type: Wood Material: 26 Gauge Aluminized Steel Pipe Class: Stove Pipe Pipe Inside Diameter: 6 Pipe Shape: Oval, Round Style: Contemporary Modern UL Listed: Yes Vent Construction: Double Wall Weight: 2