Performance descriptions: Wide pleat spacing, easy-cleaning design High filtration efficiency Top and bottom caps have plastic covers, iron covers, epdm and other materials Galvanized anti-rust caps and metal frame Rubber seal Installation methods: round flange, three lugs, four lugs, square flange Applications: Widely used in shipbuilding, large steel, locomotives and container industries, it is suitable for vacuum cleaning system. Selection of materials: Typical spunbonded polyester Water & oil resistant polyester Anti-static coating polyester Ptfe membrane polyester