Biosigma’s microcentrifuge tubes are manufactured from medical-grade polypropylene to exceed the exacting standards demanded by researchers. • Six styles of caps to choose from and three sizes of conical bottom or self-standing tubes (0.5, 1.5 and 2ml). • Biosigma’s microcentrifuges withstand high speed centrifugation up to 25.000g and temperature from -80°C to +121°C. • Autoclavable to 121°C. • Tubes made in medical polyethylene, stoppers in medical polypropylene; these raw materials are tested in according to “the United States Pharmacopoeia” (USP) and with a “Drug Master File” (DMF) at the FDA.