PTFE Syringe Filters, 3 um, 25mm, Double Luer Lock, PP Housing, Nonsterile, 100 per pack, SPEC16279. Regular Price $138.27 Price $124.70 As low as $112.23. Add to Cart. Add to Wish List. PTFE Syringe Filters, 0.45 um, 13mm, Luer-Lok/Luer Slip, Nonsterile, 100 per pack, SF14467.