... you PET,PP,Acrylic,PPS,Nomex,P84,PTFE,FMS,Glassfiber Felt Material: Polyester fiberWeight (g): 500 Thickness (mm):2.0mm ... felt adopt nonwoven workmanship, with the property of stable physical dimension, easy cake release, good air permeability, widely used for industrial ... treatment with PTFE membrane (on the surface of the needle felt), which with the property of smooth surface, water repelled, ...