Three or four 15-minute treatments with 38% hydrogen peroxide gel. Syringe-to-syringe mixing chemically activates the product, ensures a through mix and provides maximum freshness. Contains potassium nitrate, which helps decrease sensitivity associated with bleaching. To keep teeth white, follow with Venus White Pro custom take-home trays or Venus White Ultra pre-filled, disposable whitening trays. Includes: (2) 0.96ml Hydrogen Peroxide (2) 0.24ml Activator (1) 1.2ml Gingival Barrier (5) 22g Flock Tips (2) 20g Black Mini Tips