When you are creating fine or medium lines, the ArtlineĀ® 541T dual nib whiteboard markers are your go-to option. These marker pens have a 0.4 mm fine nib on one end and a 1 mm nib on the other. Perfect for use on whiteboards and other dry-erase surfaces, each of these assorted-coloured markers contain pigment-based ink that has a low-odour, is alcohol-based and fearlessly bold in colour payoff. The ink is easy to see even from a distance, making these the ideal choice for any learning environment.