Contains 3 syringes of Nite White Excel 3 Z 22% carbamide peroxide based gels. Delicious peppermint cream flavored. Strong tooth whitening. Perfect for a touch up treatment. Low Sensitivity Tooth Whitening! Now, Overnight Bleaching with Hydrogen Peroxide and Carbamide Peroxide! Nite White Excel 3 Z, a breakthrough line of effective, high viscosity, low sensitivity tooth whitening gels formulated exclusively for use in a patented dual barrel syringe.features two chambers -- one isolates a powerful and stabilized Carbamide Peroxide + Hydrogen Peroxide formula; the second chamber contains an activation gel with soothers, conditioners and desensitizers added. The gel is administered through an auto-mixing nozzle, precisely at the time of use for peak performance and maximum tooth whitening results, nothing works faster!Nite White Bleaching Gel Syringe Technology Peroxide Chamber Patients get the speed and power of Hydrogen Peroxide plus the sustained whitening activity of Carbamide Peroxide to maximize wear time. Activator Chamber Designed to unleash the full power of both Hydrogen Peroxide & Carbamide Peroxide safely and effectively. Also includes soothers, conditioners and desensitizers such as potassium nitrate. Automixing Syringe Nozzle Combines and thoroughly automixes two separate chambers creating a highly effective blend. NiteWhite is the perfect teeth bleaching gel for you.