Labcon - PerformR® 15ml and 50ml Centrifuge Tubes • Polypropylene Tubes: Temp. Range: -80°C to 122°C; RCF: 12,500 x g; Imprinted graduations • 15ml Polystyrene Tubes: Not autoclavable, Not freezable; RCF: 3,000 x g; Etched graduations • Validated Sterilization, ISO 11137, FDA and ISO 9001 registered for all tubes • Packaging: Bulk Bags or Recyclable (Reusable/Autoclavable) Polypropylene Racks • Tubes are Certified FREE of RNase, DNase, DNA, Endotoxin/Pyrogens, ATP