Selkirk 6 in. D X 6 in. D Adjustable 45 deg Aluminum Stove Pipe ElbowDouble wall construction with a 1 4 inch air space between inner and outer pipes provides a superior insulating value than single wall pipe. Better insulating value keeps flue gas temperatures higher. This helps your wood stove perform with an enhanced draft UPC: 046205020894 Manufacturer Part No: DSP6E4 1 Brand Name: Selkirk End 1 Diameter: 6 in. End 2 Diameter: 6 in. Adjustable: Yes Material: Aluminum Product Type: Stove Pipe Elbow UL Listed: Yes