hair cream developer : 1.Easy to combine with color cream 2.1.5%,3%,6%,9%,12% 3.Reduce damage to hair 4. OEM is welcome ... Professional Salon hair color peroxide : 1 ... ), 6% (20VOL), 9% (30VOL) and 12% (40VOL) available6) Highlighting/ dimensional hair coloring is done faster, easier and more precisely 7) OEM ...