The Centrifuge 5425 R's upgraded cooling system guarantees optimum separation outcomes and consistent cooling at 4°C, even when the rotor operates at its highest speed. Centrifuging samples in 18 spin columns and 1.5 or 2.0 mL tubes at a maximum speed of 18,565 x g is possible with the Eppendorf Kit rotor F-45-18-11-Kit.