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Scienceware* Microcentrifuge Tube Floating Bubble Racks
Incubate eight to twenty microcentrifuge tubes in a beaker of water or ice. Made of buoyant polymethylpentene, with tiny bubbles for additional buoyancy throughout. Racks are 1/4 in. thick with 3/4 in. legs and a center rod handle. Steam autoclavable at 250°F (121°C).