... types MoSi2 heating elements, one is M1700 type, which ensure max. furnace temperature 1650C; another ... 1700C. When you place order, please choose suitable type according to your furnace working temperature. M1700 (heat ... M1800 (heat furnace temperature 1700.C) Standard sizes:M1700 type (d/c): dia3/6, dia4/9, dia6/12, dia9 ... /18, dia12/24M1800 type (d/c): dia3/6, dia4/9, dia6/12, dia9 ...