Protect the environment and refill your gel pen: The FRIXON replacement refills for the Ball/Pro pen are available in various colors in a set of three. The line thickness is 0.6 mm. With these replacement refills, you can equip your FRIXON gel pen with new tips instead of buying new writing instruments. We offer the refills in different colors, allowing you to change the writing color as needed. The gel's unique texture makes writing particularly smooth. This is especially helpful if you do a lot of handwritten work, as it significantly eases the task. The diameter of the refill ball is 1 mm, corresponding to a line thickness of 0.6 mm. This is a comfortable width that produces easily readable handwriting. The package contains three refills, ensuring you have a sufficient supply for an extended period. Additional details: Replacement refills for the FRIXON Ball/Pro, type: gel refill, barrel material: plastic, available in various colors, refill diameter: 1.0 mm, line thickness: 0.6 mm, contents: 3 refills.