Enercos Coloray Hydrogen Peroxide 9% is a professional-grade hair developer solution in a 150 ML bottle. This product is designed for use in hair coloring and bleaching processes, providing controlled oxidation for reliable results. This product contains 9% (30 volume) hydrogen peroxide and should only be used according to product instructions. For professional use in hair coloring applications. Must be mixed with appropriate hair color or bleaching powder. Not intended for other uses. Keep out of reach of children.