The original fiber tipped marker pen Radiant, water-based ink produces expressive, fine lines. Bright and intense water-based ink is perfect anytime you put ink to paper. Snap-fit cap prevents the firm, durable tip from drying out when not in use. Perfect for general writing, drawing, doodling and adding character to any signature. Marker Ink Type: Permanent Marker Tip Type: Bullet Marker Tip Size text: Extra-Fine Marker Tip Size numeric: 0.7 mm.