DuraVent, 9609GACF, Class A, Galvanized, DuraTech, Vent Pipe, Pipe Length 60 Inch Chimney Pipe Warranty Notice: M&G DuraVent warranty applies to this professional grade product only when installed by a trained professional installer. Class A pipe is also known as Chimney Pipe or UL103 Pipe. Class A systems are used for high-temperature exhaust gases from common solid fuels such as: Wood, Coal, Oil, and other high-output fuels. This pipe is meant to be installed as a free-standing chimney system and can be connected to your stove or appliance without the need for an existing chimney. 5-8 DuraTech is a double-wall, all-fuel chimney system for use with wood stoves, fireplaces, furnaces, boilers, ranges, water heaters, or other appliances fueled by wood, oil, coal or gas, and zero-clearance fireplaces that are factory-built. With a thermal Tech Blanket insulation encased between dual walls, DuraTech offers the optimum in safety and performance. It keeps the outer wall of the chimney cool, while ensuring high flue gas temperatures for optimum draft performance. Designed for appliances that are tested and listed for use with 2100 degree fahrenheit HT chimney systems. Tested to IL test procedures 103 HT and listed under UL re-examination serve number MH 7399.