membranes - filtration Ordering Information GH Polypro (GHP) Membrane Disc Filters Part Number Description Pkg 60189 0.2 µm,25 mm 100/pkg 66557 0.2 µm,47 mm 100/pkg 66628 0.2 µm,50 mm 100/pkg 66629 0.45 µm,13 mm 100/pkg 66340 0.45 µm,25 mm 100/pkg 66640 0.45 µm,37 mm 100/pkg 66548 0.45 µm,47 mm 100/pkg 66625 0.45 µm,50 mm 100/pkg