Autofil PP is available in 3 different types of membrane: PES, Nylon, and PTFE Autofil PP is available in 2 different pore sizes: 0.2μm, or 0.45μm and it is available in 500mL and 1000mL, 0.45um PTFE Membrane for Clarification and Prefiltration The Autofil system is designed for sterilization and clarification of aqueous laboratory fluids