It is healthy and no harm to your body because of its natural elements which is gentle to your tooth enamel, and ultrathin texture make it be comfortable and soft to sticking. Indisputable that it is easy to use because the product is with the adoption of minimalistic feature. It will not cause discoloration of metal porcelain teeth. Teeth whitening strips act on the deep and superficial layers. It is an effective tooth stain remover that removes the effects of smoke, coffee, red wine and tea stains. Ultra-thin plastic material is more suitable for teeth, which is easy to use. The length of product is 11.7cm, the width is 6.3cm and the height is 1cm. It is super-compact design for you to use at home, in office, driving, traveling, anytime and anywhere. It is safe to use and easy to carry. Item Name: Teeth Whitening Strip Material: Synthetic, Plastic Effective, Convenient, Safe Size Details: 11.7cm x 6.3cm x 1cm/4.61" x 2.48" x 0.39" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Box of Teeth Whitening Strip (7Pcs) or 1 Box of Teeth Whitening Strip (14Pcs) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store