ELMI S-3.02 20M  Analog Orbital Shaker , 355mm x 235mm Working Platform, 50-300 RPM Benchtop orbital shaker with variable speed range of 50 to 300rpm for gentle to vigorous mixing with a smooth, continuous circular motion Platform holds petri dishes, staining trays, Erlenmeyer flasks, or other lab vessels with a total weight of 5kg Rotary dial for adjusting speed Orbital motion range of 20mm to ensure even mixing Includes six large magnets to help stabilize vessels on the platform during shaking operations