1. Color: The specific color for number 39 is not explicitly described in the search results, but it is one of the available shades in the product line.
2. Formula: It features a new-generation, anti-shock formula that is scientifically designed to be hard-wearing and resistant to chipping. For optimal application, use the product on clean, dry nails.
3. Brush: The nail polish comes with a flat, professional brush that gently follows the curve of the nail for excellent performance and ease of use.

Benefits

1. Durability: The lacquer is designed for long-lasting wear and excellent durability, resisting chips and premature wear.
2. Nail Protection: It helps protect fragile and cracked nails from damage, even upon contact with water.
3. Strengthening: The formula provides a firming effect, which can increase nail strength and help prevent future damage. Some descriptions suggest it can promote nail growth.
4. High Shine: The nail paint offers an extreme, brilliant shine for a professional finish.