Manufactured from medical-grade raw material to exceed the exacting standards demanded by researchers. ? DNase, RNase, Pyrogen free ? Tubes made in medical polypropylene, stoppers in medical polyethylene; these raw materials are tested in according to “the United States Pharmacopoeia” (USP) and with a “Drug Master File” (DMF) at the FDA. ? Biosigma’s microcentrifuges withstand high speed centrifugation up to 25.000 x g and temperature from -80°C to +121°C. ? Autoclavable to 121°C. for 20 minutes.