Color-Changing Ink: The pen's ink changes color when rubbed with the rubber on the back of the shaft. Versatile Ink Colors: Available in black, gray, wine red, navy, emerald, cherry, and grape. Fine Point: The ultra-fine 0.4mm tip allows for precise writing. Snap Closure: The pen has a snap cap closure for easy access. Durable Plastic Body: Made from sturdy plastic with a round, grip-enhancing plastic body. Unisex Design: The pen has a unisex design with a Japanese style and blue-black ink. Compact Size: The pen is 5.59 inches long with a maximum diameter of 0.39 inches. Ink Base: The pen uses a hybrid gel ink base for smooth writing. Point: 0.4mm
