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This round microcentrifuge rack is white in color and holds eight 1.0 1.2 1.5 or 2.0mL microtubes. The round rack conveniently fits inside 400mL Nalgene brand beakers. Made of virgin polyproplene samples can be thawed cooled and incubated at elevated or reduced temperatures. Rack will float with a full load of filled tubes and the tubes are supported below the lip. On the benchtop rack legs prevent the bottom of tubes from touching the bench surface. Excellent temperature resistance from -70°C to 100°C. Each hole has molded-in letters and numbers for easy sample identification. Not autoclavable. Material: polypropylene. Capacity: 8 tubes. Tube size: 1.0 1.2 1.5 or 2.0mL. Array: 8. Diameter: 66mm (2-5/8 inches). Fits Nalgene 400mL beaker. Color: white. Nalgene #: 5974-4014.