Macherey-Nagel PORAFIL Membrane Filters TE are high-performance filters designed for precise filtration in laboratory and industrial applications. Manufactured by Macherey-Nagel, these filters feature a 0.45 µm pore size, ensuring excellent particle retention for reliable sample analysis. The 25 mm diameter filters are made from polytetrafluoroethylene (PTFE) material, offering chemical inertness and high-temperature resistance, making them ideal for aggressive media filtration, including aqueous and organic solutions, as well as concentrated acids and bases.