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Corning 430320 Vacuum Filter System Tube Top with Polystyrene Filter Funnel, Orange HDPE Cap, Sterile, Cellulose Acetate Membrane Area, 0.22 Micron, 150mL Funnel Capacity (Case of 12): Science Lab Filtering Funnels: Amazon.com:
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Corning Centrifuge Tube Top Vacuum Filters, CA Membrane:Filters and Filtration:Bottletop | Fisher Scientific
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