Bright, blendable colors in a brush—Koi Coloring Brush pens make lettering and coloring simple and mess-free. The durable brush tip snaps back to shape and lets you create fine, medium, or bold strokes with varying pressure, just like a paintbrush. Odorless, water-based ink blends and layers smoothly for seamless color effects. With 48 transparent colors, plus a blender pen, it s easy to create limitless hues for sketches, journals, cartoons, illustrations, and rubber stamps.