This Staedtler Triplus Fibre Tip Pen features a sturdy, pressure-resistant tip and ergonomic triangular shaped barrel for comfort, even during extended use. The pen contains vibrant, water based ink, which washes easily out of most fabrics and a ventilated cap for safety. This medium pen writes a 1.0mm line width for writing, drawing and colouring. This pack contains 10 pens in assorted, bright colours.