PP Membrane Polypropylene filter membrane is made of pharmaceutical grade or food grade isotactic polypropylene ... . Specifications Pore size: 0.22, 0.45, 1.20 μm Membrane Diameter: Φ300, Φ293, Φ250, Φ200, Φ150, Φ142, Φ90, Φ60, Φ ... of the frame filter press filter. Suitable for reverse osmosis membrane, ultrafiltration membrane support and pretreatment. Polypropylene film non-toxic, in medicine, ...