Faber-Castell PITT Black Artists' Pens are ideal for sketches, studies or ink drawings, as well as for adding a finishing touch to your paintings. The pens are very durable and will last you a long time if looked after correctly and not left open. This set includes four unique tips: superfine, fine, medium and brush tips, enabling you to explore a range of effects and techniques. These Faber-Castell PITT Artists' Fine Pens have waterproof lightfast ink, ensuring your project will stay perfect, regardless of light time and humidity.Pack size: 17.8 x 5.1 x 1.8cm (7 x 2 x 0.7 inches) Four packDurableSuperfine, fine, medium and brush tipWaterproof, lightfast (fade resistant) drawing inkCan be used on a multitude of surfacesFaber-Castell PITT Black Artists' Fine Pens 4 Pack