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Sally Hansen Miracle Nail Thickener. Instantly protects thin nails. calcium and ceramic gel formula reinforces and smoothes nails. Fortifying treatment fills in ridges and imperfections so nails look smooth, healthy and shiny. Thicker, harder, stronger nails that last. Supplied in 13.3 ml bottle. To Use: Apply 1 coat to bare nails. For extra thin nails, apply daily for up to 4 days. Use alone or as a base coat. Good for 24 months once opened.