Fudenosuke Brush Pens feature firm yet flexible brush tips for different lettering and drawing techniques. Create extra-fine, fine or medium strokes by a change in brush pressure. Great for calligraphy and art drawings. Barrels are made of recycled polypropylene plastic. Water-based, pigmented black ink. Fine line. Odorless. Non-refillable. - Brush Tips – black ink - Great for calligraphy and art drawings - Water-based - Made of recycled polypropylene plastic - Fine line - Odorless