Chameleon colour tones pens are an innovative refillable alcohol based marker system, giving you the ability to change the colour tone of your pen. To 20 vibrant produce over 100 colour tones (no need to collect hundreds of pens). The pens are double ended with a japanese super soft brush nib at one end and a japanese bullet end at the other. The super soft japanese nib performs more like a paint brush than a marker nib. It's soft fibre structure allows ink to flow beautifully across paper to acheive the smoothest colour blends and transitions. The nibs are replacable.