Most standard models of laboratory mixers have one pre-set cycle speed. This is a standard 25 rocking cycles per minute, which keeps the liquid in the test tubes, vials or on the slides moving without resulting in agitation. This is also a speed that prevent coagulation or separation of most suspensions and materials, which is the goal of keeping materials on the laboratory rocker or mixer. A multi-mix rotator can be programmed to different revolutions per minute or rpms. This can vary between 5 and 30 with options to set a reciprocating timer and changing the rotation angle from fifteen to ninety degrees.