---
product_id: 27119614
title: "Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Blue)"
brand: "uni-ball"
price: "€ 25.78"
currency: EUR
in_stock: true
category: "Uni Ball"
url: https://www.desertcart.hr/products/27119614-uni-ball-signo-um-100-gel-ink-pen-0-5
store_origin: HR
region: Croatia
---

# waterproof pigment ink Uni-Flow system for smooth ink flow 0.5mm micro tip for precision Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Blue)

**Brand:** uni-ball
**Price:** € 25.78
**Availability:** ✅ In Stock

## Summary

> 🖋️ Elevate your notes with precision and style—because your ideas deserve the best.

## Quick Answers

- **What is this?** Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Blue) by uni-ball
- **How much does it cost?** € 25.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/27119614-uni-ball-signo-um-100-gel-ink-pen-0-5)

## Best For

- uni-ball enthusiasts

## Why This Product

- Trusted uni-ball brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleek Transparency:** See-through barrel lets you track ink levels—never get caught off guard.
- • **Write Without Limits:** Uni-Flow system ensures consistent ink flow until the very last drop.
- • **Waterproof Confidence:** Pigment-based ink resists smudges and water, keeping your work pristine.
- • **Durability Meets Comfort:** Tungsten carbide tip and smooth grip designed for long-lasting, effortless writing.
- • **Precision in Every Stroke:** Micro 0.5mm tip delivers a crisp 0.3mm line for flawless writing.

## Overview

The Uni-ball Signo UM-100 Gel Ink Pen features a micro 0.5mm tip that writes a precise 0.3mm line using waterproof pigment ink. Its patented Uni-Flow system guarantees smooth, uninterrupted ink flow, while the tungsten carbide tip ensures durability. The transparent barrel allows easy monitoring of ink levels, making this 10-pack of blue gel pens a reliable choice for professionals and creatives alike.

## Description

A favourite for over 10 years. High-quality and reliable rollerball featuring waterproof pigment ink and 'Uni-Flow' system to ensure a continuous consistent write to the last drop. Stainless-steel tip with tungsten carbide ball. Micro 0.5mm tip ,writes a 0.3mm line. The see through ink barrel lets you see how much ink is left.

## Features

- Uni-ball Signo UM-100 Gel Ink Pen - 0.5mm - Blue (10pcs Box)
- 0.5mm Gel Ink Rollerball Pen
- Smooth writing Gel ink

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005644GKK |
| Additional Features | Waterproof |
| Age Range Description | Kid |
| Best Sellers Rank | #233,121 in Office Products ( See Top 100 in Office Products ) #3,560 in Gel Ink Pens |
| Body Shape | Round |
| Brand Name | Uni-Ball |
| Closure Type | Snap |
| Color | Blue |
| Customer Reviews | 4.1 4.1 out of 5 stars (132) |
| Drill Point | Micro |
| Grip Type | Smooth |
| Hand Orientation | Ambidextrous |
| Ink Base | Water |
| Ink Color | Blue |
| Item Dimensions | 6.22 x 2.36 x 1.18 inches |
| Item Weight | 12 Grams |
| Line Size | 0.5 Millimeters |
| Manufacturer | Uni-ball |
| Material Type | Tungsten Carbide |
| Model Number | BC30647 |
| Recommended Uses For Product | Writing |
| Style | Refillable |
| UPC | 701936337238 |
| Unit Count | 10 Count |
| Writing Instrument Form | Roller Ball Pen |

## Product Details

- **Age Range (Description):** Kid
- **Brand:** Uni-Ball
- **Color:** Blue
- **Ink Color:** Blue
- **Writing Instrument Form:** Roller Ball Pen

## Images

![Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Blue) - Image 1](https://m.media-amazon.com/images/I/81acTpU47oL.jpg)

## Questions & Answers

**Q: Is this 0.5 or 0.7mm？**
A: 0.5. My preferred pen for years.

## Frequently Bought Together

- Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Blue)
- Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Black)
- Uni-ball Signo UM-100 0.5mm Gel Ink Rollerball Pen, Red (10 pcs Box)

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**Shop now:** [https://www.desertcart.hr/products/27119614-uni-ball-signo-um-100-gel-ink-pen-0-5](https://www.desertcart.hr/products/27119614-uni-ball-signo-um-100-gel-ink-pen-0-5)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-07-04*