DuraVent PelletVent Pro 12" Adjustable Stainless Steel Vent Pipe with Black Outer Wall - 4" Inner Diameter - 4PVP-12AB: This unit necessitates a venting pipe with a 4" inner diameter. This PelletVent Pro adjustable vent pipe by DuraVent efficiently vents pellet and corn-fueled stoves and inserts and adjusts from 4" to 10" in length. Made with .012" stainless steel inner wall and .018" galvalume outer wall, this air insulated double wall constructed chimney pipe has a black outer wall to give a sleek and professional look to your application. The seams are laser welded, and these pipes are easily connected by the patented and secure twist-lock technology. These pipes are UL Listed and provide a 1" clearance to combustibles.

Efficiently vents pellet and corn-fueled stoves and inserts Adjusts 4" to 10" .012" stainless steel inner wall and .018" galvalume outer wall Air-insulated double-wall construction Laser-welded seams Secure twist-lock connections Sleek black finish 1" clearance to combustibles UL Listed Limited lifetime warranty Dimensions: 4" inner diameter with a 4 5/8" outer diameter 12" length