This elbow is used to offset double wall stove pipe toward your insulated chimney. It has a non-positional connection system allowing 360° rotation. 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.Elbow by Angle: 90 (degree) Finish: Black Fuel Type: Wood Inside Diameter: 5-8 9 Length: 9 Material: Aluminized Steel, Stainless Steel Outside Diameter: 6-1 2 Pipe Class: Stove Pipe Pipe Inside Diameter: 6 Pipe Shape: Round Temperature: 1200 degrees F UL Listed: Yes Vent Construction: Double Wall