Derwent academy watercolour pencils are very versatile. They are made with natural wood barrels and quality water-soluble pigments that blend and dissolve easily to create a wide spectrum of watercolour shades | Can be used dry as an ordinary colour pencil but just brush on a little water to create a fluid watercolour painting | Pencils have an elegant hexagonal 6.9mm natural wood barrel and a 3.3mm core | For easy colour identification the end dip is colour match