The DuraTech 10 Class A Chimney Pipe Finishing Collar fits over the female end of the chimney pipe to provide a decorative black finish. Use on chimney pipe that is suspended with the roof support system or on pipe that is passing through a wall thimble.Fits into Female End of Chimney Pipe to Provide a Decorative Black Finish UL ListedCollection: DuraTech Depth: 12 Finish: Stainless Steel Fuel Type: Coal, Gas, Oil, Wood Inner Diameter: 10 Material: Galvanized Outer Diameter: 12 Pipe Class: Class A Pipe Shape: Round Style: Functional Vent Construction: Double Wall Weight: 2 Width: 12