1.grade:553,441,2202,3303,411,421; 2.Packing:1000kg/ ... .03≤0.004%Level 3103>99.4%≤0.3≤0.1≤0.03≤0.005%Level 3303>99.3%≤0.3 ... %≤0.40.04-0.08≤0.1-Level 421>99.2%≤0.40.1-0.15≤0.1-Level 441>99.0%≤0 ... .4≤0.4≤0.1-Level 553>98.5 ... ,>99.97%Impurities MAX.Cu1-15 ppmWtFe<1,000 ppmWtAl<1,000 ppmWtB<5 ppmWtLi<1 ppmWtP<20 ppmWtTi60-150ppmWtS5-30 ppmWtMg10-40 ...