PTFE Hydrophilic Syringe Filters, 0.22 um, 25mm, Luer-Lok/Luer Slip, Nonsterile, 100 per pack, SF18001. Polytetrafluoroethylene PTFE Hydrophilic Syringe Filters, 0.22um, 25mm, Luer-Lok/Luer Slip, Nonsterile, 100 per pack. Regular Price: $128.55. Price $98.07.