The Pentel Sign Pen S520-Y is the original fibre-tipped pen. It has non-permanent water-based ink and an acrylic fibre tip. This pen is perfect for graphics and illustrations, writing an approximate 2mm line. Made from 83% recycled material, it's a sustainable choice. A best-seller since 1963, it offers enduring quality and performance with its soft broad acrylic fibre nib.