Whatman Membranes - 0.2um - Tisch Scientific. Whatman 10406970, Sterile Mixed Cellulose Ester Filter, ME Range (ME 24), 3.1 mm white/black grid, 0.2 um pore size, 47 mm circle (100 pcs) Regular Price $50.07 Price $43.48. Add to Cart. Add to Wish List. Whatman Nuclepore Hydrophilic Membrane, 0.2 µm Pore Size, 47 mm Circle, 100 Pack, 10417012.