NAIL EXTENSION FORM - this nail building guide, suitable for polygel nail building, acrylic building, UV gel nail building. SAFE TO USE: Nail art manicure stickers are made of good quality material, which is non-toxic and will not make any negative difference to your nail. EACH NAIL HAS LINES: Each nail form has lines which are a guide exactly to make your beautiful nails, as well as lines on each nail form. ADJUSTABLE DESIGN: Adjustable design, easy to tie and fix on fingers, fits all nails of different sizes. MULTIPLE OCCASIONS: Perfect for professional nail specialists or nail art students. ideal for nail salon or home use.