Rusk Universal Shine Enhancing 20V Cream Developer in the 16 fl.oz size is a hair coloring product used to achieve vibrant, long-lasting hair color results. This cream developer is formulated to work in conjunction with hair color or lightening products, helping to activate the color molecules and ensure even, consistent color distribution. The "20V" in the product name typically refers to the volume of peroxide in the developer. In this case, 20V indicates a moderate volume developer, which is commonly used for lifting natural hair color by one or two shades or for achieving gray coverage. Users can typically expect to mix this cream developer with hair color or lightener, following the instructions provided with the specific hair coloring product being used. Its creamy consistency makes it easy to mix and apply, ensuring smooth and uniform coverage. The 16 fl.oz size provides ample product for multiple applications, making it suitable for both personal and professional use.