... 200g-1300gsm 4.Air Permeability:0-300L/m/s Polyester Filter Cloth. Both Spun bonded and Nonwoven are Available!Material ... : Polyester, polypropylene ,PTFE Membrane etc. 1.Material: Polyester2.Plain, Twill,or NonWoven3. ... Manufacturer is supposed to be your constant supplier.Specialized in filter cloth production, spun finished woven cloth, and non woven ...