The Mitsubishi Uni Jetstream Tri-Color Ballpoint Pen combines black, red, and blue inks in one slim 0.5 mm multi pen. Jetstream’s ultra-low-friction oil-based ink writes incredibly smoothly, dries quickly, and produces dark, clear lines, while the unique rear-knock mechanism makes black ink instantly accessible for everyday writing.
Key Features
Tri-Color Ink (Black / Red / Blue)
One pen with 3 core colors for notes, corrections, and emphasis; great for study, schedules, and business use.
0.5 mm Fine Point
Fine 0.5 mm tip for detailed writing in narrow planner grids, notebooks, and documents.
Rear-Knock Mechanism for Black Ink
Black ink is extended by pressing the top (rear) button, so you can intuitively access black without searching for the correct slider. Red and blue are operated with side sliders.
Jetstream Ultra-Low-Friction Oil-Based Ink
Special low-viscosity oil-based ink that reduces friction up to around 50% compared with conventional oil-based ballpoint pens, for an addictive, smooth writing feel.
Dark, Clear Lines & Quick Drying
Pigment and new coloring materials produce deep, clear lines with excellent quick-drying properties—ideal for fast writing and minimizing smudging.
Long-Life Black Refill (70% More Ink)
The black refill uses a thin-walled tube to increase ink capacity by approx. 70% vs. standard refills, while reducing plastic usage by about 30%.
Refill Compatibility
Compatible with Jetstream refills SXR-80 / SXR-203 (incl. long-life black type), so replacements are easy to source.
Comfortable, Everyday Size
Body size approx. Φ12.8 × 16.8 × 147 mm, weight about 12.5 g—balanced for long writing sessions without feeling bulky.
Modern Color Lineup (SXE350705 Series)
Available in stylish barrel colors such as Black, White Light Pink, Ice Blue, Berry Pink, Greige, matching modern planners and office setups.
Made by Mitsubishi Pencil (Uni)
Genuine Uni Jetstream quality from Mitsubishi Pencil, one of Japan’s most trusted pen brands.
