SOLD - This clean and fully functional Barnstead/Lab-Line Multi-Wrist Shaker, Model 3589, is ideal for simulating hand mixing; from very gentle shaking to vigorous agitation. Item has solid state speed control from 30 to 750 rpm. Electronic protection is provided through a front panel circuit breaker. Its mechanical timer can be set for continuous operation or in one-minute increments up to one hour. The permanently sealed ball bearing drive never needs lubricating. Aluminum side arms (included) move through a 4