The Mitsubishi Uni-ball Signo UM-100 is a 0.5mm red gel ink pen, a Japanese-imported writing instrument known for its smooth writing feel and vivid color. The transparent body allows you to easily check the remaining ink, making it widely used for office and study purposes. This is a standard off-the-shelf product without custom printing options; please check stock for bulk orders. The order unit is 1 piece. It is a steady-selling model consistently chosen by students and office workers with high writing volumes.