Slim Precision Bristles to Provide a Precise Clean for a Radiant Smile 3 -Pulsonic Brush Heads 1 - Precision Tip Brush Head Slim Precision Bristles Thoroughly Clean Teeth Brush heads can only be used on Oral-B Pulsonic handle. Pulsonic, sonic technology in our slimmest form. Questions or Comments? 1-800-566-7252 Made in China. S. electronics specifications and may need additional modifications or converters to be used in countries other than the U.S. and Canada.