Uni Jetstream 3-Color Ballpoint Pen Review: A Practical Everyday Multi-Pen

Introduction

The Uni Jetstream 3-Color Ballpoint Pen, released by Uni in December 2021, is a multi-pen built around one clear idea: make the color you use most the easiest to reach. Instead of spreading three knock buttons evenly across the barrel, Uni moved the main knock to the shaft itself, and it changes how the pen feels in daily use.

This review covers the pen’s design, writing performance, strengths, and the trade-offs worth knowing before you buy.

What the Uni Jetstream 3-Color Ballpoint Pen Is

The pen carries three colors of ballpoint ink only: black, red, and blue. There is no mechanical pencil built in. It is available in two tip sizes, 0.5mm and 0.7mm, each with its own color lineup. The 0.5mm version comes in black, white, light pink, ice blue, berry, and grey. The 0.7mm version comes in navy, dark grey, and beige, and notably has no black option.

Pricing sits at around 550 yen, and availability fluctuates on Amazon, where it can often be found at a discount. The pen measures 147mm in length and weighs 12.7g, which is light enough that the balance point barely registers in the hand.

Strengths: The Knock Design and Everyday Feel

The standout feature is the knock placement. Most multi-pens switch colors through side buttons, but this pen places the primary knock, for black ink, directly on the shaft near the grip. Uni explains this as putting the color you will use most where your hand naturally operates. Switching to black feels as quick as using a standard single knock pen, with no need to glance at the barrel to find the right button. The knock action itself is light and crisp.

The remaining colors use conventional side knocks. The grip is rubber with only shallow grooves, and it stays largely free of stickiness. The metal clip is designed to flex without breaking, and because the pen is so light, it slides onto a pocket or notebook cover easily. The barrel carries only a small, understated Jetstream marking near the top, with no other prominent printing, which keeps the pen clean enough for business settings.

The refill is another strong point. The black refill uses a thinner ink pipe than the standard design and holds roughly 70 percent more ink, making it noticeably longer lasting. It is also compatible with the SXR-38 and SXR-203 refills, which gives you replacement options. The Jetstream ink itself remains as smooth as ever, and the 0.7mm tip writes fine enough that, with a light hand, the difference from the 0.5mm version is barely noticeable.

Things to Consider Before Buying

The main criticism is appearance. The barrel is resin, and at this price that is expected, but the pen reads as somewhat cheap. The bright barrel colors outside of black make it worse, and the very light weight, while great for long writing sessions, also contributes to a feeling of low substance. If you want the pen to look more refined, the lack of a black option in the 0.7mm lineup is a missed opportunity.

That said, the light body has a practical side. The surface resists scratches and fingerprints, so you can carry it everywhere without worrying about dings. At this price, dropping it or losing it is not a crisis, which is exactly what many people want from a daily-carry pen.

Who This Pen Is Best For

This is a pen for people who mainly write in black and occasionally need red or blue. The shaft-mounted knock makes that workflow genuinely faster than a conventional multi-pen. Students writing through notebooks every day will appreciate the long-lasting refill, and anyone who pockets a pen for work will like the discreet, unbranded barrel.

It also suits anyone wary of carrying an expensive pen outside the house. At this price, you get three colors and Jetstream ink without babying the pen.

Conclusion

Used daily, the Uni Jetstream 3-Color Ballpoint Pen comes across as a genuinely good pen overall. It prioritizes usability, cost performance, and function over design polish and premium feel, and that is clearly deliberate. If you want a practical three-color multi-pen you can use freely without worrying about scratches or loss, this one is easy to recommend.