The Benchmark Scientific Z216MKE Hermle High-Speed Refrigerated Microcentrifuge (No Rotor), 230V is compact, quiet, and powerful. Add to this, the versatility of eleven available rotor options, and the result is the ideal microcentrifuge for the modern molecular biology laboratory. All common microtubes (0.2ml, 0.5ml, 1.5ml, 2.0ml) can be accepted as well as PCR strips, hematocrit tubes, and even 5.0ml centrifuge tubes. Advanced microprocessor controls allow for setting/displaying of the rotational speed in either rpm or rcf. In addition to retrieving saved programs, the easy to use front panel can adjust accel/decel rates, and change the end of run alarm tone. Despite a remarkably small footprint, the Z216-MK-E offers a uniquely designed 44 x 1.5ml dual row rotor, nearly doubling the capacity when compared to traditional microcentrifuges. Select rotors also feature our convenient Quick-SealTM lid which locks with just a quarter turn. In the Z216-MK-E model a powerful, compressor driven cooling system maintains temperatures as low as -20°C and is designed to reach 4°C (from room temperature) in less than 10 minutes.