Our tooth brightening patches contain sodium hydroxide, peppermint extract, and glycerin. It can deeply clean the teeth and effectively remove stubborn tooth stains. Its use method is very simple: 1. After gargling, place the gel part of the product on the gums; 2. Teeth and pressure to ensure the product fully adheres to the surface. Helps to remove tea stains, coffee stains, smoke stains, store teeth whitening.