Sakura Gelly Roll Moonlight Pen Set, Fine, 5-Colors, Gray. Gelly Roll Moonlight Pens shed light onto art works, school projects, memos and more. The ultra vivid, opaque inks are luminous on light or dark paper and on most porous surfaces. The ink flows through a medium or fine-nib rollerball with creamy smooth consistency resulting in extraordinary writing comfort. This set includes Blue Gray, Light Warm Gray, Cool Gray, Warm Gray and Green Gray.