• Hydrogen peroxide whitening gel at 35% WITH CALCIUM for in-office use. • Syringe coupling system. • Single application per session: The product can remain in contact with the teeth for up to 40 minutes without having to be replaced as the PH remains stable throughout the session. Besides, it causes less sensitivity. -1 set of 2 syringes :1 bleaching syringe and 1 activator syringe. **For further product information, please contact Chat Support**