100% gel polish is used in this set, along with (16) pieces, (1) wooden stick, and (1) mini nail file. It is non-toxic and eco-friendly, making it perfect for lasting 14 days without any need for topcoat. It's sustainable on natural nails, acrylic, gel nails, and shellac, and requires only a 60-120 second cure time under a UV/LED lamp. The colors may vary on screen due to lighting and color resolution, but the lasting power depends on the application and how rough you are on your hands.