The Basic White Gelly Roll pen with the nib size 10 Bold (1.0mm ball / 0.5mm line) is ideal for adding bright white lines to elevate your art to another level using bold lines and unique bold marks. The opaque white ink stands out on dark and coloured papers and makes highlights pop in illustrations and comics. Ideal for hand lettering and layered on top of colours. The Sakura Gelly Roll contains special water-based pigment gel ink to give bright, intense colours which never fade. Thanks to the unique gel ink technology, the ink flow from the pen is always constant, without exerting any pressure.