Wella Welloxon Hydrogen Peroxide is a professional hair developer containing 9% (30 volume) hydrogen peroxide in a 60ml bottle. It is designed to be mixed with hair color to achieve optimal lifting and coloring results. Key features: • 9% (30 volume) hydrogen peroxide concentration • Professional-grade developer • 60ml bottle size • Purple cap for easy volume identification • Stable cream formula This product is intended for professional use and should be mixed with hair color according to manufacturer instructions. The 30 volume (9%) strength is typically used for lifting natural hair color by 2-3 levels when mixed with permanent hair color. Always perform a patch test before use and follow all safety precautions.