1.MoSi2 hetaer 2.type:U,W,UL,WL,Rod . 3 Dia(mm):3/6,4/9,6/12,9/ ... .MoSi2 heating element 1) Main type :U, W ,UL, WL, Rod . Material grade :M1700,M1800,M1900.2) Standard dimension (mm):3 ... (4) Shank Spacing :A, mm 2013 XYX best selling MoSi2 heater for furnace