This rollerball pen features a 0.5mm tip for precise lines and smooth writing. It uses liquid ink that delivers vibrant color and long-lasting performance. The pen's unique nib provides excellent accuracy, while the dimple rollerball system ensures smooth, skip-free writing. An ink flow regulator maintains consistent ink delivery. The range includes seven colors: black, red, blue, green, violet, pink, and light blue. Available in packs of 1, 3, 6, 12, and assorted options.