The newly designed 78-RK has two frequencies each with variable speed. The HIGH and LOW are variable to allow a technician to vibrate a mixing bowl or flask at the correct speed for the plaster, stone or viscous solution to de-bubble. The fully covered large rubber table is built to hold larger flasks and mixing bowls. The rubber top is removable for easy cleaning and replacement. Four soft rubber feet hold the 78-RK in place during the heaviest vibrating cycles. The unit is coated with a baked enamel finish. Built to last for many years.