Bioland Lab Manufacturer's Microcentrifuge Tube Low Retention Sterile 2ml Natural Amber Laboratory Supplies. Low Retention Design: Reduces liquid wall hanging and material adsorption for sample integrity. DNase/RNase Free: Certified free of DNase, RNase, DNA, ATP, bioburden, and endotoxins. High Clarity & Marks: Clear graduation marks and frosted writing pads for easy sample identification. Amber Color Option: Protects light-sensitive samples from degradation during storage. Durable Construction: Uniform wall thickness and concentricity withstand up to 20,000xG RCF. Sterile Options: Individually wrapped sterile tubes available for stringent requirements. OEM/ODM Support: Full customization support including designs, samples, and minor changes.