Syringe Filters, Polytetrafluoroethylene (PTFE), Glass Microfiber Prefilter, 0.22um, Non-sterile, 13mm, 100/pack is available to buy in increments of 1 Details 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.