ADD Gel GR-50 Gel Roller Refill – Blue

The ADD GR-50 Gel Roller Refill is a blue ink refill designed for use with several ADD gel rollerball pens, including the Classic, Eins Roller Pen, Diamond Roller Pen, Pro-Tech, Xcel, and Eye Roller Gel pen. These refills are known for their smooth writing experience, leak-proof fitting, and consistent ink flow.