MINI portable centrifuge has three in one rotor: one rotor with three capacity 0.2ml,0.5ml,1.5/2ml. No need to change rotor,can centrifuge three capacities at the same. Mini-6K/7k is also compatible with 6 pcr strips. We have three kinds of MINI centrifuges:MINI-6K,MINI-7K and MINI-10K. MINI-10K is high speed micro centrifuge.