Element / Parameter, Standard Grade, High Grade (Concentrate)
Lead (Pb), 40% - 55%, 60% - 75%
Zinc (Zn), < 5%, < 2.5%
Iron (Fe), < 10%, < 4%
Arsenic (As), < 0.5%, < 0.2%
Sulphur (S), 12% - 15%, 13% - 16%
Moisture, < 5% Max, < 1.5% Max
* Size: 10mm 100mm (or as per buyer request)
* Color: Metallic silver-grey to dark grey
