For the BV101-B, powerful is the best word to describe this mini vortexer. With a 4 mm orbit and fixed speed of 2800 rpm, the Vornado instantly vortexes even the largest samples, including nearly full 50 ml tubes. Despite its powerful motor, the Vornado has a footprint of less than 4x4 inches, allowing it to fit on even the most crowded bench.