GE Bio-Sciences 10463535 ReZist Syringe Filter, PTFE/Polypropylene, Female Luer Lock/Male Luer, 5.0 µm Pore Size, 30 mm Diameter, Grey (Pack of 500) FREE delivery GE Bio-Sciences 10463505 ReZist Syringe Filter, PTFE/Polypropylene, Female Luer Lock/Male Luer, 0.2 µm Pore Size, 30 mm Diameter, White (Pack of 500)