Achieve fine lines and broad strokes, all in one convenient brush pen! The Fudenosuke Brush Pen features firm yet flexible brush tips for different lettering and drawing techniques. Create extra-fine, fine or medium strokes with a simple change in brush pressure. Details: Dual tips - black and gray ink Fine line Odorless, Water-based ink, Non-refillable Great for calligraphy and art drawings For best results, use a smooth, non-textured paper The barrel is made of recycled polypropylene plastic