4x12 ADJ Pell Vent Pipe

4"D x 12"L, Adjustable Pellet Vent Pipe, Adds 3" To 10" Of Length To 4" Rigid Pellet Pipe, Twist Lock Construction, Can Be Used In Both Vertical & Horizontal Installations, 4-1/2" OD, Designed For Stoves That Burn Wood Pellets, Double Wall & Air Insulated Pipe, Inner Wall Of .012" Super Ferritic Stainless Steel, Outer Wall .018" Laser Welded Galvalume, Patent Pending Venting For Stoves & Inserts That Use Wood Pellets, UL Listed For 3" Clearance To Combustibles In USA & Canada, Required For Venting Pellet Appliance Above 4,000'.