... 2.material:stianless steel mesh,iron wire mesh 3.layer: single layer,multi-layer edge wrapped fiter discsProcess: Package side, there are ... filters, fan filters, other types of filters. Divided by layers: single-layer filter, double filter, three filters, four filters, five filters, ... fiber, leather, cloth, color masterbatch, plastic pvc pelletizing, sheet extrusion, rubber, carbon fiber" and melt