This Lab-Line 3-D Rotator 4630 Bi-directional Rotator Mixer Shaker is in great condition, has been tested and is guaranteed to be fully functional. This shaker came from a local lab that had surplus equipment. Shaker shows slight aesthetic signs of normal use. We urge customers to view all photos as they show overall condition, included accessories and functionality. Please feel free to contact us with any questions. DESCRIPTION The Model 4630 Bi-directional Rotator is a compact, lightweight unit designed for serological and other laboratory procedures which require a smooth, consistent mixing action. The mechanical action of the unit provides a circular motion coupled with a rocking pattern that keeps liquids and solutions gently mixed without the potential for shearing or other damage. The range of motion reaches a maximum of 10 degrees from the horizontal and the mixer operates at a fixed 30 rpm. The rotator may be operated in the continuous or timer mode. The timer switch provides timed intervals of 1 minute up to a maximum of 60 minutes or a CONSTANT setting for continuous mixing action.