I stored this item in a dark place after purchasing it, and I rarely used it. It appears to be discontinued now. Clear and beautiful writing with the newly developed nano-gel ink. A cap-type ballpoint pen equipped with water-based biopolymer ink. Clear writing without blurring from the ultra-fine pen tip. Ultra-fine gel ink ballpoint pen. The pen tip employs Pilot's unique "3-point support tip," which features a 0.25mm diameter super-hard ball attached to the tip of a thin stainless steel pipe with three indentations. Because the ball is supported by "points," the friction area is small, allowing for natural rotation and smooth writing. In addition, to achieve an ultra-fine writing width, we developed "nano-gel ink," which does not bleed on paper, along with the miniaturization of the ball. Using ultra-fine biopolymers that have reached the nano (one-billionth of a meter) world, the ink flows smoothly from the ultra-fine pen tip, allowing for clear writing without blurring.