Zebra Sarasa ST-1 Gel Ink Rollerball Pen - 0.5 mm - Black
The Zebra Sarasa gel pen with threaded grip pen is designed to maintain traction on the surface of the pen. So the pen will be comfortable if you are writing for a long time. 0.5mm tip provides a smooth writing experience. The pigment ink is water-based. The ink color matches the grip color.