This polypropylene self-standing conical bottom screw top microcentrifuge tube without cap features an alignment tab to align the tube with the centrifuge rotor for multiple applications, such as desalting. This feature allows the tube to be re-spun without disturbing the partially pelletized sediment. Certified RNase, DNase, and pyrogen free. Non-sterile. Volume: 2mL. Color: Amber. Max. RCF: 20000g. Corning Axygen® #: ST-200-SS-X.