10pcs/batch Effective teeth whitening gel syringes, bleaching teeth gel Compatible teeth whitening kits are compatible with:1. Exogenous tooth discolouration (affected by coffee, tobacco, sauces, teas, foods, etc.)2. Endogenous tooth discolouration (e.g., mild fluorosis or tetracycline staining)3. Hereditary yellow teeth4. Teeth discolouration due to other reasons5. All those who want a whiter and brighter smile.3. Hereditary yellow teeth 4. Teeth discolouration caused by other reasons 5. All those who want a whiter and brighter smile. Precautions Teeth whitening gel 1, teeth whitening gel, mint flavour, fast whitening, safe to use 2, this product is not recommended for pregnant women and children under 12 years of age 3, do not use after oral ulcers, gum damage or oral operations 4, avoid contact with eyes, if contact, please rinse with water immediately 5, do not swallow the gel