Revlon Magnet Blondes Ultimate Oil Developer 30oz OIL DEVELOPER For all types of hair lightening results.? Lifts with precision and convenience while respecting the hair fiber.? Who is it for? For professionals who want to offer their clients a comfortable hair lightening service with excellent color results and maximum hair respect. Hair color developer available in three strengths: 10, 20 and 30 Vol. (3%, 6%, 9%) - Creamy, uniform consistency - Stable mixture - Precise application - To be used exclusively with Magnet? Blondes lightening products BondIN SYSTEM?-HIGH/MEDIUM/LOW LIFT This is the HIGH/MEDIUM/LOW LIFT step of the Magnet? BondIN SYSTEM? that creates and protects the hair?s internal bonds while offering a 360º protective shield againstexternal aggressors.