FINEPCR FINEVORTEX One-Touch Vortexer Mixer, 220V, 50/60Hz Vortex mixer (shaker) with variable speed of 0 to 3,000rpm for gentle shaking to rapid vortexing of samples Can be operated by touch or in continuous mode Universal rack and rubber platform for vortexing flasks and test tubes, and attaching centrifuge tubes and ampules Equipped with rubber feet and a shock-absorber system to help absorb vibration and prevent walking Acrylonitrile butadiene styrene (ABS) housing for durability and chemical resistance