Rotring Ballpoint Pen Refill for 3in1 / 4in1 / Trio Pen ( pack in 5 refills )

This pack of 5 Rotring ballpoint pen refills is designed for use with 3in1, 4in1, and Trio pens. Each refill delivers smooth, consistent ink flow, ensuring your writing remains clear and precise. Ideal for replacing worn-out refills, this set helps you maintain your favorite multi-function pen without interruption. Keep your pen ready for any task with these reliable refills.