3"d x 12"l, adjustable pellet vent pipe, fully unitized, twist lock construction, adds 3"-10" length. both vertical & horizontal installations, 3-5/8" 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.

• Use to add Length to Pellet Vent Pipe
• 12" Pipe adds 3" to 10" of length, Use with Rigid Section of Pipe.
• Cannot Be Used with Any Other Brand Than DuraVent Pellet Vent