Spin your way to watercolor wonder with Koh-I-Noor's ingenious Watercolor Wheels! Each wheel features 24 vibrant pans of opaque hues, neatly organized into 4 twist-together trays. Each tray features a different color family: Primary Colors, Orange-Red, Yellow-Green, and Blue-Earth. Plus, the crystal-clear doubles as a mixing palette, and allows your pans to dry naturally between uses. Perfect for painting on the go or class use for all levels of artist.