... 99.999%. The total content of Ag, Al, As, Au, Cd, Cr, Cu, Fe, Mg, Ni, Pb, Sn & Zn is bellow ... 99.9999%. The total content of Ag, Al, As, Au, Cd, Cu, Fe, Mg, Ni, Pb & Zn is bellow 1ppm;3 ... 99.9999%. The total content of Ag, Al, As, Au, Cd, Cu, Fe, Mg, Ni, Pb & Zn is bellow 0.1ppm ...