Pentel Arts Sign Pen assorted 3-pack contains water-based, pigmented and brush-like tip pens. The original Sign Pen has a durable fiber tip that will not break down or "mush". Ideal for general writing, drawing and doodling. The Sign Pen porous point pigment ink pen is acid-free, fade proof and water resistant. The Sign Pen porous point water-based ink pen features a "brush like" Tip that is durable.