‘s DuraPlus Basic Through the Wall Kit includes a wall thimble, one 9 inch x 6 inch horizontal chimney pipe, 1 tee with clean-out cap, 1 tee support, 2 wall straps and 1 chimney cap. This 6″ all-in-one kit saves time and guesswork and supports up to 40 feet of DuraPlus chimney pipe (not included), a triple-wall, all chimney for use with wood stoves, fireplaces, furnaces, boilers, stoves, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas. The DuraPlus chimney is designed to stay cool on the outside and provide a draft on the inside, while boosting stove efficiency. The triple-wall chimney features two insulating layers: ceramic blanket and air space. The ceramic blanket insulation is held securely in position, eliminating spots common with loose-fill type insulations. In the event of a creosote fire, the compressible blanket insulation permits the chimney liner to expand outward in a radial direction, providing a fire-safe design.