ProSeries™ Centrifuge Tubes offer maximum performance and a wide range of innovative features. ProSeries™ Tubes feature a 20,000×g RCF rating, an industry-first temperature indicator patch, and Hi-Viz™ Graduations that are recognizable at any viewing angle. Marked at both their maximum nominal capacity, as well as their maximum freeze volume, these tubes have been designed with a focus on environmentalism and waste reduction. Tubes are marked with standardized recycling information and are available in Eco-Plastic fold-flat racks rather than traditional styrofoam racks.The flat, markable screw caps feature high precision threads that make them easy to open with one hand without compromising the 95kPa rated leak-proof seal.• 20,000×g Max RCF Marked Directly on Tube • FreezeTech™ temperature Indicator Changes Color at 0°C• Hi-Viz™ Graduations, Including Maximum Freeze Line• Eco-Plastic Racks and/or Resealable Zip Bags• E-Beam Sterilized (SAL 10-6)