Pall Acrodisc Sterile Syringe Filters with Supor PES Membrane 25mm, Pack of 50, Clear, 0.45um, MPN: 4614, Code: PI-FI-4187-4614 Pall Acrodisc Sterile Syringe Filters with Supor PES Membrane 25mm, Pack of 50, Red. 0.1 um , MPN: 4611 , Code: PI-FI-4187-4611