From start to finish—all in one bottle Details Duplex Base & Top Coat 12 ml - 0.4 oz Strengthening Base Coat + High Shine Gloss Finish to Seal & Protect Nails. From the bottom to the top - all in one bottle. WHAT IT IS: A multi-use base & top coat that primes and protects nails while also locking in color with a high gloss finish that prevents polish from chipping. WHAT MAKES IT SPECIAL: * Can be worn as a base coat AND a top coat * Wide fan brush allows for easy, effortless application * Provides a strong base to prime nails and prevent yellowing * Locks in nail color and finishes as a high shine top coat that protects from chipping Key Ingredients Nitrocellulose based formula grips polish, provides high shine, and is resistant to chipping.