Add to Cart. Polypropylene Syringe Filters, 0.22 um, 25mm, Double Luer Lock, PP Housing, Nonsterile, 100 per pack, SPEC18187. Regular Price $101.54 Price $88.30 As low as $79.47. Add to Cart. Polypropylene Syringe Filters, 25mm, 10 um, Double Luer Lock, PP Housing, Nonsterile, 100 per pack, SPEC18230.