Thermo Nalgene High-Speed Polycarbonate Centrifuge Tubes, 12 mL are designed for demanding laboratory centrifugation at high speeds. Made from durable, transparent polycarbonate, these tubes provide superior mechanical strength and chemical resistance. They can be safely used in both refrigerated and ambient centrifuges at forces up to 50,000 × g. With a temperature resistance range of -135°C to +135°C, they are suitable for a wide variety of applications. The smooth round-bottom design ensures even sample distribution, while the optional friction-fit closures (Type DS3111) allow for secure sealing during high-speed operation.