Designed for appliances tested and listed for use with wood stoves, fireplaces, furnaces, boilers, stoves, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas. 6″, 9″, and 12″ chimney pipe has 1″ insulation blanket; 24″, 36″ chimney pipe has 1? 2 insulation. To calculate the installed length of DuraPlus chimney pipe, subtract 1 1? 2 from each length of chimney pipe. Known for its functionality and security; Ensuring a smoke-free and secure environment as you start up your wood-burning stove Features die-formed fittings and a twist-lock connection for easy wood stove pipe kit installation; Twist-lock connection mechanism simplifies installation process Handles emissions stemming from a diverse range of fuel sources; Wood stove indoor pipe that is designed to withstand high temperatures, ensuring longevity Equipped with 430 stainless steel material; Made for continuous operation at 1,000 degrees flue gas temperature winter after winter for wood stoves for home heating With a 12-inch length and a 6-inch diameter, this stove pipe offers a snug fit for quick installation; Requires 2-inch clearance to combustibles; Installed length is 10.75 inches.