Tisch Scientific Cellulose Acetate (CA) Syringe Filter, 3.0 µm, 20 mm, Threaded Double Luer Lock, Nonsterile, 100 Pack, SPEC18180. Price $98.00 As low as $74.97. Add to Cart. Add to Wish List. Cellulose Acetate CA Syringe Filters, 0.22 um, 13mm, Luer-Lok/Luer Slip, Nonsterile, 100 per pack, SF14485.