Features:4 times writing length, direct-injection ink storage, capacity upgrade, 4 overhead neutral pens Japanese MIKUNI ink, bright and full0.5mm spring bullet, not easy to leak inkIt is not easy to fly white and break ink, and the writing is smoother The pen is quick to dry, it is not easy to smash when it meets water, and the writing is durable and not easy to fade Specification: Material: Plastic PenType: Gel Ink PenPen Lead Diameter: 0.5mmWriting Instruments: Pens/Pencils & Writing Tools