Size : 6 oz | What it is: | Satin gel developers are silicone enhanced to provide optimal shine and conditioning during any chemical service. What it does: | They mix up with Satin color into a rich creamy-gel consistency easy spread-ability and a stay put application. What else you need to know: | The silicone base in the Satin developers provide a color protecting barrier on the hair fiber resulting in a much longer retention of color. The end result is silky shiny long lasting hair color.