TelluriumOxide3N4N5N99.9%,99.99%,99.999%TeO25N99.999%,Cu/Al/Pb/Fe/Ni/Si0.5ppmmaxea,Mg/Ca/Cd1.0ppmmaxeaTeO24N99.99%,Cu/Fe/Al/As/Si/Mg10ppmea,Pb/Se20ppmeaTeO23N99.9%,Fe0.002%,Bi/Cu/Sb0.0005%ea,Pb/As0.01%each,Zn0.0004%TeO22N599.5%,Fe0.005%,Bi/Cu/Zn0.0010%ea,Pb0.08%,Sb0.01%,As0.8%Size-200mesh,-325meshPackedinpolyethylenebottlewithsealedplasticbagoutside)