Satisfy your EnerGel® needs with this refill that provides quality and value. It is equipped with rich, acid-free, and archival safe ink that is non-smearing and quick-drying, guaranteeing that your documents will be archived safely. Quick-drying ink is also great for lefties as writing won"t smear away with touch. Pen Refill Type: Roller Ball; Special Ink Type: Gel; Refill For Series: Pentel® EnerGel® Retractable, RTX and Deluxe RTX Liquid Gel Roller Balls.