Amazon.com: Opalescence 20% Gel Syringes Teeth Whitening - Refill Kit (8 Syringes) Carbamide Peroxide, Fluoride. Made by Ultradent, in Mint Flavor. Tooth Whitening - 5196-4 : Health & Household
Opalescence™ PF 10%, 15%, 20%, 35%, and 45%-Carbamide Peroxide with Potassium Nitrate and Fluoride