This adapter is used to adapt double wall stove pipe to an existing masonry chimney or a relined masonry chimney with stainless steel liner. This product is for installations through a masonry wall. 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.Diameter: 10 Finish: Black Fuel Type: Wood Length: 11-3 4 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