Tisch Scientific Cellulose Acetate (CA) Syringe Filter, 3.0 µm, 20 mm, Threaded Double Luer Lock, Nonsterile, 100 Pack, SPEC18180. Regular Price $119.46 Price $103.88 As low as $93.49. Add to Cart. Add to Wish List. Tisch Scientific Cellulose Acetate (CA) Syringe Filter, 0.45 µm, 33 mm, Luer-Lok/Luer Slip, Nonsterile, 100 Pack, SF14490.