Tisch Scientific Syringe Filter, Glass Fiber, 0.45 µm, 17 mm, Luer-Lok/Luer Slip, Nonsterile, 100 Pack, SF17979. Regular Price $94.53 Price $83.30 As low as $74.97. Add to Cart. Add to Wish List. PTFE Syringe Filters, 0.45 um, 20mm, Threaded Double Luer Lock, ABS Housing, Nonsterile, 100 per pack, SPEC18143.