Pall ptfe 0.45 micron filter for chemicals Poly-Fine® II Series Filter Cartridges - Pall Corporation (except 0.2 micron) † Asymmetric polysulfone media used in 0.2 µm grade † Fast rinse-up to 18 Megohm-cm Performance Specifications Filter grades 0.2, 0.25, 0.45, 0.8, 2, 3, 5, 10, 30, 50, 100 µm Recommended change-out