Nylon Syringe Filters, 0.45 um, 25mm, Luer-Lok/Luer Slip, Nonsterile, 100 per pack, SF13828. Regular Price $94.23 Price $83.30 As low as $74.97. Add to Cart. Add to Wish List. Tisch Scientific PTFE Syringe Filter, 0.45 µm, 25 mm, Luer-Lok/Luer Slip, Non-Sterile, 100 Pack, SF14469.