1.layer filter cartridage 2.material:stainless steel,steel 3..layer:1.2.multilayers 4..diameter: 20-300mm layer filter cartridage Characteristics• simple process, good permeability, stability • strong corrosion resistance, recycling • easy to clean, easy installation, high efficiency, long life Application• For air, dust, industrial gases & medicine • For food, beverages, agriculture & ...