网页Tisch Scientific Membrane Filter, Cellulose Acetate (CA), 0.45 µm, 47 mm, Sterile, 200 Pack, SF18015. Regular Price $108.47 Price $94.32. Add to Cart. Tisch Scientific Membrane Filter, Cellulose Acetate (CA), 0.22 µm, 110 mm, Nonsterile, 50 Pack, SF18159. Regular Price $97.03 Price $84.38.