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Copper specs Copper û cu 99.98 % Iron û fe 2 ppm Sulphur û s 4 ppm Oxygen û o 0 Silver û ag 10 ppm Lead û pb 0.2 ppm Nickel û ni 0.2 ppm Selenium û se 0.3 ppm Antimony û sb 0.1 ppm Silica û si 0.3 ppm Cobalt û co 0.2 ppm Arsenic û as
