Achieve vibrant, long-lasting hair colors with the Global Keratin GK Hair Professional Hair Cream 20 Volume Developer. This powerful developer is designed for use with semi-permanent hair colors, lighteners, and toners, ensuring even, reliable results. The 5 fl oz formula is perfect for professional use or at-home application, providing optimal lightening and color retention. Ideal for anyone seeking salon-quality colors with lasting brilliance. Combine it with your favorite GK Hair products for a flawless finish.