Goldwell Silk Lift Developer 3% 10 Volume Conditioning Cream 25.4 Ounce 750 Milliliters This is formulated using Silk protein Complex for conditioning and structural balancing during the lightening process. Without ammonia, it ensures a gentle whitening of up to 7 pitches. *This is a professional product and should be used only by a trained individual. The seller is not liable for any adverse outcome resulting from the use of this product.