A comprehensive range of disposable syringe filter devices designed to provide fast and efficient filtration of aqueous and organic solutions. They are made with a wide variety of membrane filters with a polypropylene or polycarbonate housing using the most advanced methods and design features available today. Suitable for numerous applications in pharmaceutical, environmental, biotechnology, food/beverage and agricultural testing laboratories Heat sealed without the use of glues or sealants.- Syringe Filter, 4mm Dia, Whatman Puradisc, Non-Sterile, 0.2m Pore Size, Hydrophobic Membrane, 100/pk