Multitube vortexers are designed to hold multiple test tubes, vials, or cylinders. The vortexing action is created by securing the top of the vessel in place while allowing the bottom to move freely in a defined 3.6mm eccentric orbit. Two stainless steel posts hold support plate securely in place for quiet, rattle-free mixing. Loosening knobs and lifting plate up and down easily adjust support plate. The circular groove around the top of the taller post allows the support plate to swing away from tray for easy removal of samples. The suction-cup feet dampen motion and prevent sliding on work surface.