Uni-ball ZENTO Flow Model 3-Color Gel Pen | Black, Red & Blue Ink | 0.38 / 0.5mm

Uni-ball ZENTO Flow Model 3-Color Gel Pen

Engineered for those who write fast and think faster. The uni-ball ZENTO Flow Model 3-Color by Mitsubishi Pencil (uni) pairs a lightweight plastic barrel with a precision metal grip zone, delivering a balanced, fatigue-free writing experience across black, red, and blue gel ink — all in one pocket-ready pen.

Key Features

• 3-Color Gel Ink System — Black, red, and blue ink in a single pen; switch colors instantly with the multi-color selector
• Metal Grip Zone — Knurled or textured metal section provides a secure, non-slip hold during extended writing sessions
• Lightweight Plastic Barrel — Durable resin body keeps the pen light and comfortable for all-day carry
• Ultra-Smooth Gel Ink — Water-resistant, fade-resistant, and quick-drying across all three colors
• Two Nib Options — 0.38mm (extra fine) for precision detail / 0.5mm (fine) for everyday versatility
• Refillable Design — Compatible with uni-ball ZENTO multi-color gel ink refill cartridges

Specifications

• Brand: Mitsubishi Pencil / uni
• Model: ZENTO Flow Model 3-Color
• Ink Colors: Black, Red, Blue
• Tip Size: 0.38mm / 0.5mm (select variant)
• Ink Type: Water-based gel
• Barrel Material: Plastic (resin)
• Grip Material: Metal
• Origin: Japan

Who Is This For?

Students, teachers, planners, and professionals who need three ink colors on hand without carrying three pens. The ZENTO Flow Model is built for speed, comfort, and color-coded clarity — from lecture halls to boardrooms.

Frequently Asked Questions

Q: How do I switch between the three ink colors?

A: The ZENTO Flow Model uses a multi-color click mechanism — press the corresponding color selector at the top of the pen to extend that ink tip. Only one color is active at a time, keeping the other tips safely retracted.

Q: What is the difference between the 0.38mm and 0.5mm variants?

A: The 0.38mm produces an extra-fine line, ideal for small handwriting, dense note-taking, and detailed annotations. The 0.5mm offers a slightly broader, smoother stroke — the most popular all-purpose size for everyday writing.

Q: Why does this pen have a metal grip on a plastic barrel?

A: The combination is intentional. The plastic barrel keeps the pen lightweight for all-day carry, while the metal grip zone adds tactile control and prevents slipping during long writing sessions — the best of both materials.

Q: Is the ink waterproof or fade-resistant?

A: Yes. All three ink colors use water-based gel ink that is highly water-resistant and formulated to resist fading over time, making this pen reliable for important notes, records, and documents.

Q: Is the pen refillable?

A: Yes. The ZENTO Flow Model is compatible with uni-ball ZENTO multi-color refill cartridges. Replace individual ink colors as they run out without replacing the entire pen.

Q: Is this pen suitable for left-handed writers?

A: Absolutely. The quick-drying gel ink across all three colors significantly reduces smearing, making the ZENTO Flow Model a practical choice for left-handed writers.

Q: What paper types work best with this pen?

A: The ZENTO Flow Model performs well on smooth and standard office paper. For best results with the 0.38mm tip, use coated or semi-coated paper (e.g., Rhodia, Clairefontaine). The 0.5mm tip handles a wider range of paper textures with ease.