Triplus 334 C15H Fineliner Pens - Assorted Triplus Fineliner Pens for adult-coloring books and more, 15-Piece Brilliant Color Pen-Set, Staedtler: packaged in a box with see-through heart shape making it very suitable for gift-giving. Acid-free ink doesn't dry out. The ink in these unique pens is specially formulated to flow smoothly and avoid drying out, even when the cap is left off for up to 14 days. And the porous tip helps draw ink onto the paper for sharp, skip-free lines. Point allows for precise strokes. The super-fine metal-clad tip is perfect for those occasions when you need to put down crisp, clean, precise lines, or when you need to write small because space is limited. Triangular barrel makes writing effortless. The barrel's unusual triangular shape helps you grasp the pen more comfortably and exercise more control for hours of fatigue-free writing. And because it's triangular, this nonrefillable pen is less likely to roll away from you when you lay it down. A handy pocket clip makes it easy to tote hands-free. 0.3mm fineliner point allows for precise strokes.