... PE needle Felt Filter Bags 1.Material:Needle felt PP,PE 2.Welding or Sewing 3.Plastic Ring or Steel Ring 4.Size, 7"x17" PP/PE needle Felt ... Filter Bags were made by PP,PE,Nylon,Nomex and Oil ... filter bag vesse together. 7"x17" PP/PE needle Felt Filter Bags1).Nominal micron filter bags (#1,#2 ... C-D-E-F-G-HA: PP(Polypropylene)PE(Polyester)NMO (Nylon Monofilament)NME( NOMEX)OIl ...