Toothbrush-Dentifrice Assessment Instrument Zahradnik/Hefferren/SabriInformation: A single toothbrush versatile dentifrice assessment instrument has been designed to evaluate brushing efficacy of manual and electrically powered toothbrushes currently being marketed in a laboratory simulated operational test protocols. Test can be performed on the stained human, bovine teeth or any desired material shaped flat or convex specimens which are placed in the trough in wet or dry conditions. Brushing speed and brushing test cycles are programmed and set in the front control panel of the instrument. Brushing pressure on the manual brushes is applied directly on the head by the weight holder and on electrical powered brushes by round collar weights ranging from 50-200 grams. Operating Voltages: 115v AC/60 HzWeight: 50 lbs.