The Rusk Universal Shine Enhancing 10V Cream Developer in the 16 fl.oz size, offered as a 2-pack, provides a total of 32 fl.oz of developer. This cream developer is specifically formulated to work in tandem with hair color or lightening products to activate color molecules and ensure consistent, vibrant results. With a 10-volume formulation, this developer is ideal for toning, refreshing, or depositing color on hair that has already been lightened or treated. It's commonly used in various hair coloring techniques to achieve desired shades or tones while maintaining hair health and integrity. Each bottle in the 2-pack offers ample product for multiple applications, making it convenient for both personal and professional use. Whether you're a salon professional or an at-home enthusiast, having a 2-pack ensures you have an adequate supply of developer on hand for your coloring needs.