manufacture ISO certification high quality,competitive price. Mesh: 8-12, 16-24, 20-30. 30- ... °Loss on drying≤0.5%Fe mg/kg≤5 mgSulphate (SO42-)≤0.05%Pb mg/kg≤1 mgChloride(Cr)≤0.05%Mesh ... meshPacking:1, Kraft paper bag or pp bag of 25 kg net each2, 3g, 17g, 100g, 200g, 227g, 250g, 400g, 454g ...