Stabilo Pen 68 Felt-Tip Pen Set, 10-Piece Set, 6810/PL STABILO® Pen 68 Felt-Tip Pen Case, Line Width: 1 mm Pen Body: Plastic, depending on the writing color Round tip, pressure-resistant, water-based, odorless, universal pigment ink Intense color premium felt-tip pen for crisp lines and opaque surfaces, color chosen for unparalleled brilliance and intensity Certifications and Approvals: CE, Spiel Gut (Good Toy) Metal case of 20 pens.