If you are using 50ml and 15ml round bottom tubes and the speed is > 10,000 rpm, you can choose the FA15C rotor for Velocity 18R Pro, 14R Pro and 14 Pro.
Further information about Dynamica Centrifuge please visit https://dynamica-sci.com/products/centrifuges/versatile-centrifuges/velocity-18r-pro-versatile-centrifuge/
