Clear Peroxide Developers: Our Clear Peroxide Developers stay full strength with repeated openings and are available in 20, 30, & 40 volume. This dependable crystal clear peroxide provides quality results with any bleach, toner, or tint. Details: Stabilized formula guarantees consistent results Maximum color deposit for gray or white hair Delivers beauty vibrant results Standard lightening action and superior gray coverage Clear Developer Volumes: 10 Volume does not lift the hairs color. Instead, it opens the cuticle for color deposit 20 Volume lifts the hair for 1 to 2 levels of lightning 30 Volume lifts the hair 2 to 3 levels or allows you to lift or lighten up to 3 shades 40 Volume lifts the hair 4 levels lighter 50 Volume lifts the hair 5 levels lighter Note: Due to the large nature and weight of this item, shipping charges will apply if multiple units are purchased.