Oct 29, 2021 · Wholesales 0.22 um PTFE filter Teffil-Analytical Testing Vials. Product information Syringe driven filters are widely used in laboratory, whichare easy to operate, safe and effective. Available with 6 membrane types of CA, PVDF, PES, MCE, Nylon and PTFE 3 membrane areas of 0.88, 3.46 and 4.45 cm 2 3 pore sizes: 0.1 μm , 0.22 μm and 0.45μm