ANOW hydrophobic PES filter membrane discs are widely used in lab air filters.it chemical compatibility is very ... high. About ANOW PVDF hydrophobic lab filter membrane disc: ... 0.22um, 0.45um, DIAMETER: Φ13, Φ25, Φ47, Φ50, Φ90, Φ100, Φ106 Φ142, Φ150, Φ200, Φ250, Φ293, Φ300 ... box (without separator in between) Hydrophobic PVDF air filter membrane disc