Guanjing Teeth Whitening Strips (14-Treatment Pack) are at-home dental brightening kits designed to lift surface discoloration. The package contains 28 individual strips, providing 14 applications for the upper teeth and 14 for the lower teeth. According to seller listings on Amazon AE, the formula utilizes a peroxide-based whitening gel combined with plant glycerin and mint oil to target stains while mitigating enamel discomfort.