Features: - Bleaching, fluoride, gingival dam. - Chemically activated, so no light is needed. - Powerful 40% hydrogen peroxide gel. - Opalescence tooth whitening gel contains PF (potassium nitrate and fluoride). - Fresh chemicals for each application. - Easy to see for complete removal. - Two to three 20-minutes applications. - Thicker formula prevents the gel from running. - No refrigeration is required prior to mixing. Kit contains: - 1 x 1.2 ml Opalescence Boost/Activator syringes. - 1 x 1.2 ml OpalDam syringe. - 1 x UltraEz syringe