?Customer Service?: A skin test before use is necessary. Stop using immediately once feeling uncomfortable! Please feel free to contact us by mail if you encounter any problems. We have a professional after-sales service team that can solve the problems for you more faster and effectively. ?Safe Formulated, Safe for your nails?Free of harmful substances, natural organic formula including Keratin and Jojoba oil which supplement calcium and nutrients required by nails. 5-Free: Phthalate free, Aceton free, Formaldehyde free, Fragrance free, Cruelty free. ?Strong Effect Nail Strengthening polish?: It can repair damaged nails, which are weak, split, chips, thin, brittle, or cracked. We recommend using it once every 3 days for better effect. ? Perfect Ridges Filler?: It can smooth your ridges or bumps on the nail surface and prevent discoloration, make your nails shiny, even, smooth, and show a natural tint color. ?Multifunction Nail Repair Kit?: As a nail strengthener for daily protection of natural nails, it helps to stronger nails. As a ridges filler, after applying, the nails' surface will be full and shiny, and have a natural tint, which will make them look healthier. As a base coat, the milky white finish is perfect to create a natural nude look.