36 Inch Straight Length Pipe (black) PelletVent Pro is a venting system designed for stoves and inserts that use wood pellets and oil fuel. It is also built to vent biofuel products such as corn, switch grass, cherry pits, soybeans, coffee husks, to name a few. Rate for continuous feed use flue temperatures up to 570 degrees fahrenheit. All PelletVent Pro components that come into contact with flue gases are built with an inner wall or corrosion resistant super-ferritic metal. PelletVent Pro is engineered with features for a durable, safe and aesthetical pleasing venting system. PelletVent Pro is a paten-pending system for stoves and inserts that use wood pellets, corn and other biofuels, or oil as fuel. As a result of Simpson DuraVent's cutting edge manufacturing process and commitment to innovation. PelletVent Pro is uncompromised in attention to detail and performance. This perfect fit and finish is made possible with a laser-welded inner and outer wall. Features fully unitized twist-lock construction in 3" and 4" diameters. Listed at 1" clearance to combustibles in the USA and Canada. It can be used in both vertical and horizontal installations. Stainless steel welded seam inner wall, combined with galvalume welded seam outer wall.