Polypropylene Syringe Filters, 1 um, 25mm, Double Luer Lock, PP Housing, Nonsterile, 100 per pack, SPEC18189. Regular Price $101.54 Price $88.30 As low as $79.47. Add to Cart. Polypropylene PP Syringe Filters, 3.0 um, 25mm, Luer-Lok/Luer Slip, Non-sterile, 100 per pack, SF18112. Regular Price $119.91 Price $104.27.