Description; General description; Simple to use, hold the shaft end against the rubber pad or test tube cup of a vortexer and quickly mix eight or twenty 1.5ml tubes. Rugged polypropylene construction. 165mm (6 1/2") long shaft has a 25.4mm (1") diameter ball handle. 1 each, Simultaneously vortex multiple 1.5ml microcentrifuge tubes using a standard vortexer. • Two capacities available, 8 and 20 tube; Legal Information; Bel-Art is a registered trademark of SP Scienceware, a division of SP