Expression 0.22 um syringe filter for sale-Voa Vial Supplier 5 Whatman Syringe Filter Gd/x Glass Microfiber .45um Pore Size 25mm and Seal. 5 out of 5 stars. (3) Total Ratings 3, $12.99 New. 100pcs 25mm 0.22 Micron Syringe Filter Made by Nylon Deschem Chemistry Labware. $36.85 New. 4 Whatman Syringe Filter Gd/x 13 Nylon Membrane 0.2um Pore Size