Lyra Watercolour Graphite Chalk Set Watercolour Graphite Chalk Set from Lyra contains three types of hardness: 2B, 6B and 9B. Ideal for sketching and drawing in large areas. Suitable for use on paper and cardboard, for example. Specifications: Colour: black Gender: unisex Material: graphite Chalk length: 6.5 cm Chalk diameter: 1 cm Package height: 14 cm Package diameter: 8 cm Age: from 4 years Contents: 8 2B Chalks 8 6B Chalks 8 9B Chalks