PTFE Membrane Filters, 0.45 um, 50mm, Nonsterile, 100 per pack, SF14685 Regular Price $70.51 Price $61.31 Add to Cart PTFE Membrane Filters, 0.45 um, 260mm x 300mm, Nonsterile, 50 per pack, SF17386 Regular Price $438.13 Price $380.99 Add to Cart Tisch Scientific Nylon Membrane Filter, 0.45 µm, 150 mm, Nonsterile, 50 Pack, SF13884