Perform both test tube separation and microhematocrit using the Combo centrifuge. Simply choose a box (with or without a digital speed meter) and select the rotors. The Combo device spins test tubes, capillary tubes, or small tubes simply by changing the rotors - no tools needed! Get hematocrit separations in less than five minutes at a speed of 12,000 RPM; then accurately determine the results using the attached reading disc.