... rod at Ht,electrode,lead,support,typing ,needle ,etc.W1/2/3/4Applied for making electrode,lead and heater componentsNote: Quality is ... elementWAl1≥99.95%≤0.001%≤0.002%≤0.001%W1/2/3/4≥99.95%≤0.001%≤0.002%≤0.001%NOTE ... not regarded as impurity.Lowest price ,high quality,looking forward to your inqury.