Dental whitening system with different concentrations of carbamide peroxide 10% - 16% with potassium nitrate and fluoride. It has a sticky and viscous consistency that prevents leakage outside the tray. DOCTOR KIT. Kit contents: 8 x 1.2 ml Opalescence PF + 2 Softray sheets of 09 mm + 1 colorimeter + 1 pocket case for trays + 1 x 1.2 ml LC Block-out resin + 1 x 30 ml Opalescence toothpaste + 1 Opalescence bag. Flavorless. New application time: 4-6 hours. EXCLUSIVE SALE TO DENTISTS.