Tornado Vortexer. The Tornado™ Vortexer is very flexible, general purpose mixer for applications that demand vigorous and uniform vortexing. The innovative single mixing head is suitable for variety of tube sizes, from 0.2 mL to 50 mL. •Variable speed rotary dial provides pre-set speed control (1000, 2000, 3000 rpm) during vortex mixing • Stable elastomeric device feet, provide vibration dampening and prevent movement during operation • Innovative head can be removed for cleaning purposes • year warranty • Weight: 3.93 kg • Dimensions (W D H): 171 190 197 mm (with mixing head in place)