US Stove SD9088 DuraPlus is designed to stay cool on the outside, to provide a hot draft on the inside, to boost stove efficiency, and to provide for a fire-safe design that protects both the chimney and the building. This triple-wall chimney features two insulating layers (ceramic blanket, plus air space). The ceramic blanket insulation is held securely in position, eliminating hot spots common with loose-fill type insulations. In the event of a creosote fire, the compressible blanket insulation permits the chimney liner to expand outwardly in a radial direction. DuraPlus Chimney is a triple-wall, all-fuel chimney for use with wood stoves, fireplaces, furnaces, boilers, stoves, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas. Features: -Wall chimney set. -Twist lock design. -Safe, triple wall design. -All-in-one kit saves time and guesswork. -Used for a through-the-wall vertical chimney installation. -Supports up to 40' of dura plus chimney pipe (not included). -Set includes wall thimble, one 9 x 6 horizontal chimney pipe, one tee with clean-out cap, 1 tee support, 2 wall straps and 1 chimney cap. -Manufacturer provides 1 year warranty against defect. -Made in the USA. Dimensions: -Inner diameter: 6. -Overall dimensions: 36 H x 10 W x 10 D, 40 lbs.