036093070 -"HEI-Torque Value 400 - HEI-Torque Overhead Stirrers, Heidolph North America - Each: Amazon.com: Industrial & Scientific
HOW TO - Operation of the Quick Chuck (Hei-TORQUE 400) - YouTube
Heidolph 036093150 HEI-Torque Precision 400 Overhead Stirrer, USB Interface, 93 mm Width x 273 mm Height x 241 mm Depth, 115V, 150W: Amazon.com: Industrial & Scientific