FilterBio Sterile Syringe Filters are available with Polyethersulfone(PES), Polyesteramide(Nylon), Cellulose Acetate(CA), Polyterafluoroethylene(PTFE), Polyvinylidene Fluoride(PVDF). And each filter is individually packed and sterilized by Gamma Redaition. Every syringe filter is printed with expiry date for easy QC tracking.