The water-based teeth whitening gel keeps teeth hydrated and contains potassium nitrate, which helps eliminate sensitivity. - The one-size-fits-all whitening trays can be worn during the day or overnight, and custom trays also can be used. Kit includes: - 1 Syringe activator. - 1 Syringe of whitening gel. - 1*1.2 ml syringe of desensitizing gel. - 1*1.2 ml syringe gingival barrier resin and 8 tips. **For further product information, please contact Chat Support**