This strong micro-porous film membrane is constructed from a high temperature polyethersulfone polymer that is acid and base resistant. These membrane filters are recommended for aqueous solutions biological applications and protein filtration. They are designed to remove particulates during general filtration and their low protein and drug binding characteristics make them ideally suited for use in life science applications. Excellent flow speed, even with viscous liquids. They are supplied as standard in pore size 0.2 and 0.45 μm, and in different 6 diameters.