pore size 0.22um teflon mushroom syringe filter Aijiren-HPLC PTFE Hydrophilic Syringe Filters, 0.22 um, 25mm, Luer-Lok/Luer Slip, Nonsterile, 100 per pack, SF18001. Regular Price $119.55 Price $103.95 As low as $93.56. Add to Cart. Polypropylene Syringe Filters, 0.22 um, 25mm, Luer-Lok/Luer Slip, Nonsterile, 100 per pack, SF14690.