The MIKRO 220 spins at an unmatched speed of 18,000 RPM and delivers an RCF of 31,514 in just 26 seconds. Ultimate flexibility is provided by a choice of 7 different rotors from 0.2 ml microliter tubes to 50 ml conical tubes, allowing for numerous research applications on a single machine. This unit is available with refrigeration and a temperature range from -20 °C to +40 °C (MIKRO 220 R)..https://www.gaiascience.com.sg/productdetails/mikro-220--microlitre-centrifuge