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500ml Vacuum Filtration System, Disposable Sterile Vacuum Filter Units with CA Membrane, 0.22μm Pore Size, 90mm Diameter for Laboratory, Chemistry, Graduated, Individually Wrapped, Pack of 1 -
500ml Vacuum Filtration System, Disposable Sterile Vacuum Filter Units with PES Membrane, 0.22μm Pore Size, 90mm Diameter for Laboratory, Chemistry, Graduated, Individually Wrapped, Pack of 12