Ready-to-use, syringe-driven units designed for sterilizing and clarifying sterile solutions are available in 0.1, 0.22, 0.45 and 5.0µm pore sizes. Pricing and Availability. Basix™ Syringe Filters, PTFE, Non-Sterile. Attach to the end of syringes and filter contents as it is being forced out.