6 Pack of 0.25 oz bottleCND Shellac UV Base Coat cures in just 10 seconds under a UV lamp and provides the crucial foundation for the Shellac system.What it does: It is a gel base coat that last for up to 2 weeks and guarantees evenness and smoothness of the nail. What else you need to know: Try with CND Shellac UV Colors and UV Top Coat for the best results and the longest wear.