Color Collection by Intensity Fineliner Marker Pen provides vibrant colors & bold, crisp writing. This pen is perfect for writing, doodling & drafting & great for adult coloring. The water-based ink won't bleed through paper (Results could vary based on paper characteristics). Pen Sub-Brand & Product Family: Intensity; Pen Type: Porous Point Pen; Pen Style: Stick; Pen Tip Type: Needle.