The PRO250 is offered as fit between the smaller PRO200 and the larger benchtop PRO homogenizers. It's light enough for handheld operation, yet has extra torque for processing tough samples. A 3/4 hp, 576 watt motor combines with variable speed control to provide processing for a range of sample sizes. QUICK CONNECT rotor stator generators range in diameter from 5 to 30 mm, and process samples from .03 ml up to 20 L. Optional speed control boxes are available with either a five digit digital display or analog control. Both speed control boxes can be connected to the PRO250 control speed within a range of 0 to 30,000 rpm.