The OEM Zebra Pen Sarasa Gel Retractable Pen features smooth-flowing, water-based, pigment gel ink for a superior writing experience. Its soft rubber grip ensures comfort and control during use. The translucent barrel allows for easy visibility of ink color and supply, while the ink is acid-free and archival quality. These pens are also refillable with Zebra's JF-Refill, making them a sustainable choice for your writing needs.