Blending the best features of gel and ballpoint ink, these uni-ball JetStream refills dry quickly for clean, smudge-free lines. Slip them into your pencil case or office desk, so youre always ready to write when it counts. Quick-drying formula helps prevent smearing. For use with uni-ball pens. JetStream pen refills contain blue ink and feature 1.0 mm points for rich, striking lines.