The OEM Zebra Pen Sarasa Gel Retractable Pen features smooth-flowing, water-based, pigment gel ink for a superior writing experience. Designed with a soft rubber grip for enhanced comfort and control, this pen ensures scratch-free writing. The translucent barrel allows for visible ink color and supply, while the acid-free, archival quality ink guarantees durability. These pens are also refillable with Zebra's JF-Refill.