Selkirk 6" to 8" 45 Degree Elbow (Double Wall Stove Pipe - DSP)Selkirk 6" to 8" 45 Degree Elbow Used to offset Double Wall Stove Pipe toward insulated chimney. Non positional connection system allows 360 degree rotation. DSP Double Wall Stove PipeClose clearance, double wall connector used to connect a gas, liquid or solid fuel burning appliance to a chimney. DSP's better insulating value means superior stove performance. 6" to 8" Diameter: 430 Stainless Steel Inner Liner Aluminized Outer Wall 1 4" Air insulated