Full power for maximum cleaning performance With slightly stronger CUREN® filaments. And yet soft and gentle on the gums. The difference between effective and perfection. Unbelievable: a CHS 300 Power brush head provides maximum performance for sonic toothbrush professionals. This power head cleans to perfection yet is still extremely soft and gentle. Our CUREN® filaments have a diameter of only 0.152 mm which alongside its hydrodynamic effect ensures it can clean areas other filaments are unable to reach. CUREN® filaments, 0.152 mm in diameter Reach all the critical areas Exceptional cleaning performance Pleasantly soft and gentle Developed in cooperation with Prof. Dr. med. dent. Ueli P. Saxer Compatible with Hydrosonic CHS 100 & Hydrosonic Black is White Pack of two