Whatman Nuclepore Polycarbonate Black Membrane Filter, 0.2 µm Pore Size, 47 mm Circle, 100 Pack, 111156. Regular Price $213.58 Price $185.72. Add to Cart. Whatman Nuclepore Hydrophilic Membrane, 0.2 µm Pore Size, 142 mm Circle, 25 Pack, 112106. Regular Price $352.37 Price $306.00.