12 Different Sizes: individually numbered 0-11, 10pcs/size, easily to choose the suitable size for your nails | Perfect Length With Scale: designed with perfect length and a clear scale on the nail surface, convenient for you to choose and control the length you want to do. | High Quality: No toxic, No smell, No harm to your nails and makes the nail durable & natural. | Easy to use the poly nail gel/builder gel nail extension. | Suitable for professional salon use and home DIY nail art.