FILTSTAR Series Syringe Filter FILTSTAR syringe filters are ideal for small volume filtration, such as liquids, gas, and other material-specified applications. Media material have Nylon, PTFE, Hydrophilic PTFE, PES, PVDF, MCE, CA, GF, PP, Active Carbon, in both sterile and non-sterile varieties, with GF or PP pre-filter choice available for customer need.