Uni-Ball UB-157 Eye are water-based ink rollerball pens. These pens have an ink view level on the side of the pen which shows how much ink is remaining. There is also a flow system which keeps ink delivery consistent.
- Capped rollerball pens
- Medium 0.7mm tip
- Smooth water-based ink
- Ink delivery system for consistent flow
- Ink level indicator
- Cap can be place on the end of the pen