Mitsubishi Pencil Water-based Ballpoint Pen uniball ZENTO Refill 0.38 Black 10pcs UBRZ38.24 10P 1320 Product Description uniball ZENTO Refills, 10 pieces per pack Enjoy a comfortable "writing" experience with this soft water-based ballpoint pen. Equipped with newly developed ZENTO ink. Equipped with newly developed ZENTO ink Features a stress-free, soft writing feel and clean lines that minimize blurring. ● "Cushion component POA surfactant" (polyoxyalkylene) achieves a soft writing feel. It acts as a cushion between the pen tip ball and the paper surface, reducing friction during writing. *Approximately 40% reduction compared to our conventional products. ● "Attracting particles" that suppress ink spread and blurring By attracting ink to each other, it suppresses blurring and bleed-through of the drawn lines. Product Name: Mitsubishi Pencil Water-based Ballpoint Pen uniball ZENTO Refill 0.38 Black 10pcs UBRZ38.24