Vortex Mixer VX-200 - Unique CombiCup™ head has a nonslip surface and accepts single or multiple tubes of various sizes. Mix and vortex any size tube. Variable speed Vortex Mixer VX-200 provides fast, efficient mixing with minimal vibration. Features a true circular orbit that allows for even distribution of vortexing across the entire speed range. CombiCup™ head, supplied as standard, accepts many different tube sizes. A full range of accessories is available to accommodate most common laboratory tubes and plates. Continuously variable speed makes the Vortex Mixer VX-200 useful for a variety of applications, from gentle mixing to resuspending pellets. The unit has a circular orbit, rather than elliptical allowing a vortexing motion to be achieved even at low speeds. The Vortex Mixer VX-200 can be operated in either "touch" or continuous mode. When in "touch" mode, the motion is activated by depressing sample head and stopped by removing pressure. If the unit is set in the "on" position, the Vortex Mixer VX-200 will operate continuously until turned off. CombiCup™ head can be used with a single tube or a whole handful. Unique over molding technology used in the manufacture of CombiCup™ provides a sturdy plastic core surrounded with nonslip TPE. Optional heads available. Powerful, reliable motor, optimized counter balance system minimizes vibration, circular orbit for effective vortexing at any speed, standard CombiCup™ accepts a variety of tube sizes, full range of accessories available. Specifications: Speed range: 0 - 3, 400 rpm Vortex a single tube or a handful with the operating modes touch or continuous ambient operating range: 4° to 65°C nonslip TPE.