Sakura Gelly Roll Pen Set, 10-Colors, Medium. Decorate, doodle, color-code and vision board with these Gelly Roll pens! These pens glide smoothly for comfortable writing and note-taking. Gelly Roll ink is a hybrid of the best features of ball-point pen's grease and a rollerball's liquid ink. This set includes orange, brown, pink, navy, burgundy, blue, red, green, purple and black.