The Pilot Frixion Slim 3-Color Ballpoint Pen is a functional writing tool that uses special ink to erase writing via frictional heat. It features a 0.38mm fine tip for precise writing and a slim, pastel-toned body design. It includes black, red, and blue ink, supporting efficient color switching for work or study. After writing, you can simply rub with the dedicated rubber tip at the end of the pen to make the ink transparent, making corrections easy. It is ideal for office supplies or student stationery.