DIRECT-TEMP®/Multi-Fuel Stoves (DT-M) is a unique venting system designed to address the problem of highly corrosive flue gases produced by burning corn or other bio fuels. It converts any conventional corn-burning or multi-fuel stove into a Direct-Vent system. DT-M features an All Stainless Steel construction; with the flue gas carrying components constructed of AL29-4C stainless steel. DT-M also possesses a Silicone Gasket which is designed to seal and create a leak-proof connection. Available in 3 in and 4 in diameters. Selkirk® by Duravent DIRECT-TEMP®/Multi-Fuel is designed for maximum safety, long-life, excellent value and performance.