PTFE Syringe Filters, 0.45 um, 20mm, Threaded Double Luer Lock, ABS Housing, Nonsterile, 100 per pack, SPEC18143. Price $132.18 As low as $112.23. Add to Cart. Add to Wish List. PTFE Syringe Filters Hydrophilic, 5 um, 25mm, Double Luer Lock, PP Housing, Nonsterile, 100 per pack, SPEC18155. Price $140.45 As low as $119.25.