F.D.A, EN71, ASTM or CE approval. Non-toxic Fashionable, eye catching designs. Save money & time going to nail salon. It is nail art water decal sticker, water transfer sticker, style stripe, instruction at the package, picture of actual object, easy to use. It"s certified by CE, non-toxic to humans.. Preparation tools: scissors, small water storage containers, paper towels, toothpicks or tweezers. 1. Trim, clean, and polish the fingernails, paint the background color if you like and dry it out . 2. Remove the film of the product, cut out the desired pattern and dip it into water for 10-20 seconds. 3. Moisten the fingernail, gently put the sticker to the nail surface, let it smooth and glossy. 4. Use soft towel to absorb excess water and blow dry if necessary. 5. Apply a topcoat or clear polish.