... kinds of machinery.Chemical: GradeChemical composition/ %O ImpuritiesCuFCuN-20<0.1<0.3marginFCuN-50<0.01<0.3marginFCuN-80<0.01 ... impurities includes elements such as B,Al,Si,Cr,Mn,Fe,Co,Cu,Mo,W,P,C,S. We offer at ... with 100-1000g in a metal box. nano copper particles Fe,Cu,Ni,Zn,Ag,Sn,Bi