Polypropylene Celgard 2400, 2500,3500 Hoechst microporous 0.043, 0.064 Celgard 2400, 2500, 3500 Data Polypropylene GH Polypro (GHP) Pall porous Hydrophilic 0.2, 0.45 GH Polypro (GHP) Data Polypropylene Metricel Pall porous Hydrophilic 0.1 Metricel Data Polypropylene WPP Whatman porous 0.45 WPP Data