Membrane Filters, 0.1um, 0.22um PTFE Membrane Filters, [] 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 $154.67 Price $134.49 Add to Cart PTFE Membrane Filters, 0.22 um, 37mm, Nonsterile, 200 per pack, SF14683 Regular Price $136.89 Price $119.04 Add to Cart