THIS ITEM MUST BE MIXED WITH A DEVELOPER . Berrywell Augenblick hair dye from Germany is the leading European seller. Each .5 oz. tube is enough for 50+ applications. This is Medium Brown/ Dark brown or also called: Natural Brown. Your client will be so excited and will return to you every 3 to 4 weeks to do it again. The results are great. *** THIS ITEM IS FOR PROFESSIONAL USE ONLY***