Syringe Filters, Polytetrafluoroethylene (PTFE), Glass Fiber Prefilter, 0.22um, Sterile, 25mm, 100/pack from I.W. Tremont at Southern Labware. We have large collections of scientific lab supplies, equipments & glass labwares. Shop Now! HPLC Certified High-quality and cost-effective Syringe Filters are available in a broad range of membrane materials with sterile and non-sterile packaging options.