manufacture ISO certification high quality,competitive price. Mesh: 8-12, 16-24, 20-30. 30-40, 40-60, ... -)≤0.05%Pb mg/kg≤1 mgChloride(Cr)≤0.05%Mesh standard8-12, 16-24, 20,30,40, 40-60, 60 ... , 250g, 400g, 454g, 500g, 1000g polythene bags in carton3, Or as clients requirements.