(LME standards) Standard Cu Cathode-1, purity 99, 97-99, 99 %Dimension: 914 mm x 914 mm x 12 mm (LME standards) Copper (Cu) min% 99.99% Other materials may be present which are described below: Oxygen O2 -- Sulfur S 4 PPM Iron Fe 2 PPM Silver(Argent 10 PPM Lead Pb 0.2 PPM Nickel Ni 0.2 PPM Selenium Se 0.3 PPM Antimony Sb 0.1 PPM Silica Si 0.3 PPM Cobalt Co 0.2 PPM Arsenic As 0.1 PPM Bismuth Bi 0.1 PPM Manganese Mn 0.1 PPM Tellurium Te 0.05 PPM Aluminum Al 0.5 PPM Magnesium Mg 0.4 PPM Zinc Zn 0.4 PPM