The Bibby Stuart Mini-Vortex SA6 is a compact , powerful vortex mixer for tubes up to 30mm diameter. Speed range is adjustable from 2500 to 4500rpm with 4.5mm orbit. Mixing starts when the flexible cup is depressed. Overall 100 x 100 x 67mm W x D x H. Weight 0.55kg. For 100-240V 50/60Hz single phase supplies. 15W.