Create extra-fine, fine, or medium strokes by just a change in brush pressure. Fudenosuke Brush Pens feature two tips, soft and hard, for creating different writing styles. Great for calligraphy, hand lettering, and drawing, Fudenosuke Brush Pens contain waterbased, pigmented, odorless ink. Their barrels are made of recycled polypropylene. Non-refillable.