From the PelletVent Pro collection, a vent system that is designed for stoves and inserts that are using oil fuel and wood pellets, brings to you the DuraVent 4PVP-35BF Bioflex Pipe. It is designed to use when you reline your masonry chimney for use with your biofuel appliances. This is made of super ferritic stainless steel that makes it very resistant to corrosion. It measures 4-inches in diameter and 35 foot in length. To create a smooth installation, this should be used together with PellentVent Pro Male and Female Flex adapters.For your needs on your venting systems, trust DuraVent and their highly-innovative products. Search yours now here at PlumbersStock.com.