The Edding EcoLine 21 permanent marker black has a round tip and a writing width of 1.5mm - 3mm. You can create durable markings with the quick-drying and low-odour ink. It is suitable for use on various materials, such as plastic, wood, metal, glass and cardboard. This permanent black marker is an eco-friendly choice for all your markings and writing. The exterior consists of 90% recycled plastic and the ink is easily refillable.