385-2216-OEM: EZFlow Syringe Filter-Sample Prep, 0.22um Hydrophobic PTFE, 25mm, 100/pack. EZFlow 13mm, 25mm, and 33mm Syringe Filters are used for prefiltration, clarification, sterilization, or fine particulate removal. These syringe filters are available in a variety of filter membrane materials in both 0.2um and 0.45um pore sizes.