Syringe Filters, Disposable. We are proud to offer 4mm, 13mm, 25mm, and 30mm syringe filters for Ion Chromatography. We also offer 13mm and 25mm sterile syringe filters. With several sizes and many membranes styles, you are sure to find an appropriate syringe filter for your application. Our most popular syringe filters are the 25mm size.