Whatman Puradisc 25 mm PTFE Syringe Filters, 0.2 µm, 50 Pack, 6784-2502 Regular Price $214.04 Price $186.12 Add to Cart Whatman Nuclepore Hydrophilic Membrane, 0.2 µm Pore Size, 25 mm Circle, 100 Pack, 10417006 Regular Price $113.53 Price $98.72 Add to Cart Whatman 6874-2502 GD/X 25 mm Syringe Filter, PTFE filtration medium, 0.2 um (150 pcs)