Built to last with a system combining corrosion resistant stainless steel and sturdy galvanized steel. It features a space-age ceramic fiber refactory blanket to withstand intermittent temperatures up to 2100 degrees F, is noncombustible, thin and lightweight. It features the same small outer dimensions and is compatible with the AmeriVent Model FB. It is light enough to be easily installed by one man. Kit contains stainless steel cap, standard flashing, storm collar, ceiling support and single wall adaptor.