PTFE Syringe Filters, 0.22 um, 13mm, Luer-Lok/Luer Slip, Nonsterile, 100 per pack, SF14466. Polytetrafluoroethylene PTFE Syringe Filters, 0.22um, 13mm, Luer-Lok/Luer Slip, Nonsterile, 100 per pack. Regular Price: $93.47. Price $82.63. Buy 10 for $74.37 each and save 10%.