Staedtler Ergosoft Watercolor Pencil Set Sold as 24/ST. Pre-sharpened wood-case, watercolor pencils offer water-soluble leads that are perfect for dry and wet blending. Soft, break-resistant lead has a 3.0mm diameter. Innovative soft coating on triangular-shaped barrels provides a slip-free, ergonomic grip. Included easel display case allows convenient handling. Case is reclosable and has easy-to-open interior clamshell with cutout touch hole.