COPIC Gasenfude (pronounced gas-en-fu-day), is a high-quality, genuine nylon brush pen. Its long, flexible bristle nib allows you to create a dry-brush effect while the super fine point is suited for detailed work, making this pen ideal for hand lettering, calligraphy, comic art, or traditional brush art application. Archival 9 mm long bristles Water-based, black pigment ink Sturdy, genuine nylon bristles 3.1 mm diameter at brush base Super fine point for detail work Long, flexible bristles for dry-brush effects COPIC compatible ink