The STAEDTLER triplus colour fibre-tip pen has an ergonomic triangular shape for relaxed and easy writing and colouring. The fibre-tip pen is dry safe which means it can be left uncapped for days without drying up. The water based-ink washes out easily of most textiles. The fibre-tip pen has a linewidth of approximately 1 mm. Staedtler Ergonomic Triangle Shaped Triple Fiber Tip Ballpoint Pens for Relaxed, Easy Writing and Coloring Dry Safe - Can be left uncapped for days without drying out. Can of 15 Staedtler triplus assorted color pens approx 2mm width Stable, pressure resistant tip Water-based ink, washes off easily from most textiles.