Built for durabiility and rugged use. 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 larrger flasks and mixing bowls. It is remvoable for easy cleaning and replacement. Dimension: 8"W x 6 1/2" D x 4 1/2" H