Description_x000D_ General description_x000D_ The BenchMixer V2 utilizes a smooth and powerful mixing technology similar to the original BenchMixer, with the advantage of a uniquely designed reversible rubber head that can be attached to the mixer in two orientations._x000D_ For the vortexing of single tubes, the cupped surface would generally be preferred. However, for applications requiring a flat/dimpled surface for mixing uniquely shaped vessels (or a handful of multiple test-tubes), the head can easily be flipped over and reattached in reverse orientation._x000D_ Like the original BenchMixer, the drive system is balanced with Q-Drive technology, providing a smooth vortexing action, while minimizing noise and excessive vibration. This results in quieter, more efficient and longer lasting operation. With a maximum speed up to 3,200 rpm, the mixer provides an instant vortex of even the largest sample sizes, including full 50ml tubes._x000D_ Features and Benefits_x000D_ Reversible top platform, cup or flat-dimpled surface_x000D_ Powerful motor for INSTANT vortexing_x000D_ Continuous or "touch" operation_x000D_ Q-Drive dynamic balancing system_x000D_ Variable speed from 200 to 3200 rpm_x000D_ Wide variety of accessories, for tubes up to 50ml_x000D_ Legal Information_x000D_ Benchmixer is a trademark of Benchmark Scientific, Inc.