... furnace temperature 1700C. When you place order, please choose suitable type according to your furnace working temperature. M1700 (heat furnace temperature ... 1650C )M1800 (heat furnace temperature 1700C)Standard sizes:M1700 type (d/c): dia3/6, dia4/9, dia6/12, dia9 ... atmosphere. According to your request, our company can produce the products of Pole, "U", "W" and "U"-right angle shapes, etc ...