The Ultradent Opalescence 35% PF Mint Teeth Whitening Gel Refill Syringes 2/Pack deliver professional-level whitening power in a compact refill kit. Formulated with 35% carbamide peroxide and 20% water, the gel whitens teeth effectively while helping reduce sensitivity and keeping enamel hydrated throughout treatment. The refreshing mint flavor provides a more pleasant whitening experience, and the 1.2 ml syringes are designed for convenient use with custom trays, aligners, or retainers. Trusted by dental professionals worldwide, Opalescence effectively lifts stubborn stains and brightens smiles safely at home.