1. Fiberglass scrim support 2. PTFE / PPS/ NOMEX bath 3. excellent hand make PTFE Nonwoven Dust Collector Filter Media Cement Filter Bag  PTFE ,Fiberglass Needle Felt with Fiberglass Scrim Fiber: PTFE + FiberglassScrim: Fiberglass filamentWeight(gsm) : >650Thickness(mm) : 1.4Width(mm) : 2000Finish Treatment: PTFE treatmentAir Permeability( mm/s ) : 130 ~ 160Tensile Strength(N/5*20):(Warp)  >1800Tensile Strength(N/5*20):(Weft)  >1800Tensile Elongation(%): (Warp): < 10Tensile Elongation(%): (Weft) : < 10Temperature(Degree Celsius): Continue:  240Temperature(Degree Celsius):Instant :  260