Developed with master pastel artists, the assortment of extra-fine dry pastel pencils provide the widest range of shades. Developed and manufactured in our Geneva workshops. Caran d'Ache's know-how and expertise in the world of colour guarantees 100% Swiss Made quality. Lead diameter: 4.7 mm. Strong point & rich creamy texture adheres to most surfaces, and shades easily. Recommend sharpening with sharp blade. Hexagonal rounded shape makes it easy to hold, and reduces risk of rolling off work surface Made with the highest quality California cedar wood. Color Identification number is on each pencil Lightfastness indicator ***** (Blue Wool Scale) Prop. 65 Warning: These products contain a chemical known in the State of California to cause cancer.