Heidolph Reax 20 / 4. Overhead shaker for 4 bottles. The speed can be individually and continuously adjusted from 1 to 16 rpm - and corresponds to DIN38414 part 4 specifications. Other speeds, e.g. B. 0.5 to 8 rpm or 2 to 32 rpm are available on request. Bottles are easy to insert and remove thanks to quick-release technology. Do you also work with mixing cylinders or wide-neck bottles? The Reax 20 models are also for these with a height of 160 - 290 mm and a diameter of max. 136 mm ideally suited. UPGRADE.