SELKIRK 4 In. x 12 In. Adjustable Type L Pellet Stove Pipe

4VP-WZAJ12, 4" x 12", Adjustable Pellet Stove Pipe, Type L Vent, Gives Installer The Ability To Add From 2-1/2" Length To A Maximum Of 10-1/2" When Slid Over Another Piece Of Type L Pellet Pipe, Proven Coupling Joint Connects In Seconds To Assure Joint Integrity, Gasketed Joint Design, Double Wall Design With 1/4" Airspace, Inner Wall 304 Stainless Steel, Outer Wall Paintable Galvanized, Rolled Over Male End Eliminates Sharp Edges, 1" Clearance To Combustibles.