SELKIRK Sure-Temp Double Wall 90 Deg Smoke Pipe Elbow Elbow is fixed at 90 deg degree , but can be rotated 360 deg at the connection. Designed with double wall construction and a durable stainless steel inner liner. Intended to be used in place of standard single wall stove pipe. Used to offset Double Wall Stove Pipe toward insulated chimney in a through the wall installation. Interlocking joints, secured with screws provided, allow for quick and easy system assembly. Air space between inner and outer pipe allows reduced clearance to combustibles. 6 clearance to combustibles for 6 pipe as compared to 18 for standard single wall pipe. Engineered for superior smoke venting and safety. Helps reduce creosote build-up. Installation requires no cutting. Stainless steel inner liner, matte black steel outer casing. 6 I.D. Clearance To Combustibles 6 , Inside Diameter 6 , Outside Diameter 6-1/2 , Finish Matte Black, Material Stainless Steel Liner Galv Jacket, Pkg Qty 1