Disc Chameleon Refills Deep Violet Refill VO4 25ml.

Chameleon Color Tones is an innovation alcohol-based marker system that give you the ability to change the color tone of your pen! Each pen produces multiple color tones, giving you the ability to create stunning effects such as 3D, smooth transitions, highlighting, shading, gradations and blending, all with one pen. All Chameleon Color Tone markers are refillable and all nibs are replaceable; use the Chameleon Tweezers to easily remove nibs and refill pens."