... 99.999%. The total content of Ag, Al, Cd, Cu, Fe, Mg, Ni, Pb, Se, Si & Sn is bellow 10 ppm ... 99.9999%. The total content of Ag, Al, Cd, Cu, Fe, Mg, Ni, Pb, Se, Si & Zn is bellow 1 ppm ... 99.99999%. The total content of Ag, Al, Cd, Cu, Fe, Mg, Ni, Pb, Se & Zn is bellow 0.1 ppm ...