1.Dust filter bag material: POLYESTER, PPS, NOMEX, PE, FIBERGLASS, PP, ARYLIC 2. All ... of surface finish, PTFE coating 1.The material of the dust filter bag: POLYESTER, PPS, NOMEX, PE, FIBERGLASS, PP, ARYLIC. 2.Our company ... the filter bags, one is external filter bag, the other one is internal filter bag.We can meet the different requirment of media and type! dust filter bag