... temperature 1700C. When you place order, please choose suitable type according to your furnace working temperature. M1700 (heat furnace ... C )M1800 (heat furnace temperature 1700.C) Standard sizes:M1700 type (d/c): dia3/6, dia4/9, dia6/12, ... industries of metallurgy, glass, ceramic refractory, crystal electronic device, industrial furnace manufacture, etc.. It is an essential ideal element when ...