Stay Strong system The OPI GelColor line includes a Stay Strong system that provides extra strength and durability. With added gel, the formula has more staying power and a thicker viscosity for increased strength. It is infused with calcium and a vitamin complex that leaves nails feeling strengthened during gel use. Sleek grey design The OPI GelColor 15ml in Suzi Talks with Her Hands from the Muse of Milan collection is a sleek grey shade. With approximately 80 sets per bottle, this shade can be used for numerous occasions. This shade exudes professionalism and is sure to make a statement. 30 second cure time With a 30 second cure time between coats, these gels are quick and easy to apply. They can be cured under both LED and UV lamps and can last up to 3 weeks.