PTFE Syringe Filters, 0.45 um, 25mm, Double Luer Lock, PP Housing, Nonsterile, 100 per pack, SPEC17163. Regular Price $152.01 Price $132.18 As low as $118.96. Add to Cart. Nylon Syringe Filters, 0.45 um, 33mm, Luer-Lok/Luer Slip, Nonsterile, 100 per pack, SF16003. Regular Price $127.34 Price $110.73 As low as $99.66.