Stainless steel flue liners are installed as a protective sleeve to keep moisture, smoke, creosote, & carbon monoxide contained so that it can’t leach into concealed areas of the chimney or your home. This improves the performance of your appliances and the safety of a chimney. They can be in the form of individual rigid pieces or one continuous length of flexible tubing. Available in 304 for high heat wood burning appliances or 316 alloy for high acidity oil, gas, & coal appliances. Most are available in 3 thicknesses consisting of .006″ as the industry standard corrugated go to product, .010″ as a smooth wall product great for an all around upgrade of increased capacity, & .015″ as a heavy duty best of the best product for extreme use or big fireplace restorations. These are available in multiple diameters from 3″ to 18″ and shapes of round, oval, square, & rectangular. They can be installed from the top down, bottom up, and around offsets. We supply & install these components.