Chimney has been filling the supply and accessory needs of over 8,000 chimney sweeps hearth retailers masons and contractors for over 25 years. Chimney has the privilege of serving over 80% of the chimney professionals in America.Founded by Robert Daniels Sooty Bob in 1978 Chimney has grown from a one-man operation to a national network of six warehouses and a manufacturing plant. From its headquarters in Fairfield Iowa Chimney plays a major role in providing for the Chimney industry. . DuraFlex 15 Stainless Steel Chimney Liner. 6-in. diameter. Light-weight .006 metal thickness makes it stronger than other light liners. Most economical liner for straight chimneys. Manufacturers limited lifetime warranty