The versatile, end-over-end tube roller and Rotators are designed for mixing samples in both a vertical and horizontal plane. They can be placed in an environment temperature ranges from 5 to 40° and the rotation speed is adjustable, from 0 to 99 rpm. Tube Rollers, Rotators and Rocker are designed to deliver salient performance, accuracy, and reproducible results for all your application needs. - End-over-end or rolling action, gives gentle but effective mixing - Adjustable speed range of 0 to 80 rpm - Used with a wide variety of accessories - Continuous quiet operation