Pipe lengths provide the core part of the vent system. Pipes should match the inside diameter of all other pieces and all pieces should be from the same manufacturer. This DSP length is the ideal type to connect a wood burning appliance to a chimney system. for installed length, subtract 1-3 8 from the overall length of this pipe. Model DSP has an attractive outer black painted surface made of durable aluminized steel to withstand temperatures up to 1200 degrees F of continuous operation.Finish: Black Fuel Type: Wood Inside Diameter: 5-8 9 Length: 6 Material: Aluminized Steel, Stainless Steel Outside Diameter: 6-1 2 Pipe Class: Stove Pipe Pipe Inside Diameter: 6 Pipe Shape: Round UL Listed: Yes Vent Construction: Double Wall