The GVM-AS Variable Speed Vortex Mixer is the best choice for vortex mixing in your lab. Speed adjustment between 100 - 2500rpm is as easy as rotating the analog dial. A slight press on the top cup quickly and efficiently vortexes virtually any tube. Continuous run function and available adapters allow for simultaneous mixing of multiple samples. A heavy-duty cast aluminum base and suction cup feet make the GVM-AS extremely stable despite its compact footprint.