Nov 01, 2021 · polypropylene housing 0.22 um PTFE syringe filter for acids Oct 29, 2021 · EZFlow® Syringe Filters. 33mm Syringe Filters are used for prefiltration, clarification, or fine particulate removal. These syringe filters are available in a variety of filter membrane materials, offered in 0.2µm or 0.45µm pore sizes.