PTFE Syringe Filters, 3 um, 25mm, Double Luer Lock, PP Housing, sterile, 100 per pack, SPEC18140. Regular Price $273.62 Price $237.93. Add to Cart. Add to Wish List. PTFE Syringe Filters, 0.10 um, 33mm, Luer-Lok/Luer Slip, Nonsterile, 100 per pack, SF18086. Regular Price $177.77 Price $154.58 As low as $139.12.