Mar 25, 2022 · SKC offers two types of polytetrafluoroethylene (PTFE) filters: a) 60.0, 10.0, or 5.0 µm pore size PTFE filters are pure PTFE microfibres fused together at intersection points. These hydrophobic membranes provide ultimate chemical resistance and are temperature stable to 260°C. b) 2.0, 1.0, or 0.5 µm pore size PTFE filters are comprised of a