The Alkali ScientificR3010 TubeRoller Rocking Roller with 10 Rollers (US Plug) is designed for the gentle and thorough mixing of a variety of containers including Vacutainers bottles test tubes centrifuge tubes and roller bottles The right side of each roller is gently elevated through each revolution and guarantees that each sample receives thorough mixing The Alkali ScientificR3010 tube roller operates at a constant 38rpm chosen as the optimum speed for the broadest range of mixing requirements Electrical 115V/50-60Hz/50W Speed Range 2 - 80 rpm Load Capacity 4 kg As the roller mechanism rotates through each complete revolution the right side of each roller is gently elevated about 0 5 in (13mm) and returns to the horizontal starting position This additional gentle up/down motion provides a wave effect and guarantees that the entire sample is subjected to complete thorough mixing end to end Accepts tubes and bottles from 8mm to 200mm This built in tilt feature provides a level of