The OEM Zebra Pen Sarasa Bold 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, while the translucent barrel allows for easy visibility of ink color and supply. The ink is acid-free and archival quality, making it suitable for long-lasting documentation. These pens are also refillable with Zebra's JF-Refill, providing an economical and sustainable writing solution.