... air permeability 3. Customer size accepted 1.Material of bag filter: POLYESTER, PPS, PE, NOMEX, P-84, FIBERGLASS, ACRYLIC, 2. Finish ... membrane, PTFE dipping, etc 1. The mateiral of the bag filter: (1) 100% POLYESTER (2) ANTI-STATIC POLYESTER (3) 100% ... external filter bag, the other one is internal filter bag. We can meet the different requirment of media and type! Dust collector filter bag ...