The Cole-Parmer WA-200 simulates a vigorous wrist-shaking action. With clamps to accept 8 flasks up to 500ml capacity. With stepless variable speed control and 10 to 60 minute timer with off and continuous run settings. Electronic feedback control ensures a constant speed irrespective of the load. Overall 780 x 270 x 240mm W x D x H. Weight 8.3kg. For 230V 50Hz single phase supplies.