The Libretto is a rollerball-style pen that uses Pentel’s Energel gel ink refills. Pentel calls it’s a “Roller Gel” pen despite that not being a popular naming convention.
Pentel Libretto Roller Gel Pen Information
| Street Price | Check Price |
| Manufacturer | Pentel |
| Pen Type | Rollerball / Gel |
| Rating | |
| Barrel Color | Black, Silver |
| Barrel Material | Metal |
| Body Diameter (mm) | 10.0 |
| Grip Color | |
| Grip Material | Black |
| Grip Diameter (mm) | 9.0 |
| Country of Origin | Japan |
| MSRP | $19.99 |
| Still Sold | Yes |
| Similar To | |
| Refills | |
| Capped? Retractable? | Metal |
| Clip? | Metal |
| Weight (g) | |
| Refillable | Yes |