Oct 29, 2021 · plastic 0.22 um PTFE filter Restek-Analytical Testing Vials. Sep 28, 2021 · PTFE Membrane Filters, 0.22 um, 25mm, Nonsterile, with PP substrate (Meets the requirements of USP Plastics Class VI) 200 per pack, SF17375 Regular Price: $140.30 Price $126.88. Filter Vials 0.2um PTFE w/pre-slit cap. Thomson SINGLE StEP. Send Inquiry