... elements is Yuhao MoSi2 Heating Elements. material grade:1700,1800diameter:D1/D2,mm/mmHot zone length:Le,mmCold end length:Lu,mmShank ... spacing:A,mmexamples:material grade 1800, D1=3mm,D2=6mm,Le=140mm,LU=125mm,A=25mmspecify as :Yuhao ... MoSi2 MS1800,ushape,3/6×140×125×25WShape ,1700,D1=6mm,D2=12mm,Le=300mm,Lu=250mm,A=50mspecify as :Yuhao MoSi2 ...