PTFE Syringe Filters, 0.22 um, 25mm, Double Luer Lock, PP Housing, Nonsterile, 100 per pack, SPEC16251. Tisch PTFE Syringe filters are very versatile, proving to be effective for applications such as alkali filtration, strong acid solvent filtration, and organic solvent with strong chemical causticity filtration. Regular Price $152.01 Price