Featuring dense and bold colours, the Artline® bi-nib whiteboard marker pens are the perfect addition to meetings, classes and tutorials. With 2 nibs in one, they offer an added level of convenience and versatility that allows for differing line widths. The nibs share a common ink reservoir so that one nib will not dry out before the other. The ink inside has a low odour, is alcohol-based and Xylene-free, making it an essential tool to add to your classroom or office.