Uni-ball Jetstream 0.7mm vs Uni-ball One P 0.38mm
Uni-ball Jetstream 0.7mm ($3) vs Uni-ball One P 0.38mm ($5) — side-by-side specs, weight, pros and cons to help you pick the right rollerball.
Spec-by-spec
| Spec | Uni-ball Jetstream 0.7mm | Uni-ball One P 0.38mm |
|---|
| Price | $3 | $5 |
| Weight | 10g | 8g |
| Tip | 0.7mm hybrid ink | 0.38mm (finest ballpoint) |
| Ink | Jetstream ultra-smooth | Pigment-based JETSTREAM |
| Body | Plastic grip | — |
| Lines | Dry instantly | — |
| Refillable | Yes, SXR-7 | — |
| Origin | Japan | — |
| Weight | — | 8g |
| Barrel | — | Compact body |
| Refill | — | Yes (SXR-202-38) |
| Colors | — | Multiple |
Pros & Cons
Uni-ball Jetstream 0.7mm
- Smoothest writing at any price
- Dries instantly no smear
- $3 replace without regret
- Grip comfortable for long sessions
- Best hybrid ink formula
- Plastic body feels cheap
- Not a status flex
- Refills relatively expensive vs new pen
Uni-ball One P 0.38mm
- 0.38mm extraordinarily fine
- JETSTREAM ink does not skip
- Pigment ink smear-resistant
- 8g essentially weightless
- $5 replacement if lost
- Tiny barrel may not suit large hands
- Grip finish can get slippery
- Refills not at every store
Uni-ball Jetstream 0.7mm is the better value at $3. If weight matters most, Uni-ball One P 0.38mm carries lighter at 8g. Both are part of our curated rollerball index — tap through to check current pricing.