Sakura-Pigma Professional Brush Pen. The beauty of brush strokes, made simple in a pen! Achieve expressive thick or thin strokes with a flexible nib. Quality nibs with excellent bounce. Rich, black Pigma archival ink that is waterproof and fade resistant on fine papers. This package contains three professional brush pens with fine, medium and bold tips. Conforms to ASTM D 4236. Imported.