3 Essential Steps: Choosing the Right Nylon Syringe Filters A syringe filter is generally a plastic housing with a membrane that serves as a filter. Designed to press fluid through the filter. The process of choosing the right filter for your syringe can be quite meticulous as patient safety is the first priority in this context. There are various types of filters out there to choose from, naming a few: RC, PA-Nylon, PTFE(PTFE Membrane are the most popular filter membrane out there recommend by the pharmaceutical companies), PVDF, pp, ps, and few more. But choosing the right one can be cumbersome and mind-boggling. Here are 3 simple steps that you can follow to select the right Nylon Syringe Filter.