This pack of ProMarkers is ideal for your colouring projects. If you are into manga drawings, card making, graphic design or simply love the craze on colouring books these are the perfect pens for you. Each pen is double-ended, with a broad chisel nib for large area fills and a fine bullet tip for more detailed work. The translucent inks can also be overlaid and blended to create flawless blending and an even greater range of hues. ProMarker pens contain non-toxic alcohol based inks that can be used on multiple surfaces, such as paper, acetate, glass, metal, plastic and wood.