The OEM Pilot G6 Gel Pen features smooth-writing gel ink and a retractable design for convenience. It has a rolling ball tip, rubber-coated barrel, and a contoured finger grip for improved writing comfort and control. This pen uses an acid-free, archival-safe gel ink formula that is water-resistant, fade-resistant, and smear-proof. It is also refillable with the G2 gel ink refill.