DuraPlus Chimney is the metal chimney that does the 3 things a firesafe chimney must do: stay cool on the outside, provide a hot draft on the inside, with a firesafe design that protects both the chimney and building. It is designed for appliances that are tested and listed for use with a 2100deg F HT chimney system such as wood stoves, fireplaces, furnaces, boilers, stoves, ranges, water heaters or appliances fueled by wood, oil, coal or gas. This kit has all the components for standard vertical installations. You add DuraPlus 12in. chimney pipe Item# 36627 or 36in. Item# 36628 to complete. U.S.A. Diameter (in.): 6 I.D., Compatible With: DuraPlus 12in. chimney pipe Item 36627 or 36in. Item 36628, Material Type: Galvanized and stainless steel, Mounting Type: Vertical, Includes: (1)Chimney cap with spark arrestor, (1) Storm collar, (1)Adjustable flashing (0/12-6/12), (1)Insulation shield, (1)11in.H x 18 1/4in.W ceiling support box with built-in starter section and (1)trimSnap-lock adapter, Pieces (qty.): 6