Refill for customized pen and preview. Gel Ballpoint Pen Refill Multi-functional pen that can be customized: Multi-function pen that can be combined freely with holder and refill. In addition to the "emulsion ink" which is characterized by mixing water and oil with a slurly writing experience, there are 4 types of writing types, including gel ink, oil ink, and sharpness, and each of them comes with a variation of color and thickness. Gel Ink: Gel ink writes smooth and smooth Because it is water resistant and water-based pigments, it is dark and does not bleed through, so you can enjoy vivid colors and a wide variety of colors.
