---
product_id: 264692039
title: "Uni-ball Signo Dx Um-100 Gel Ink Pen - 0.5 Mm - 10 Pcs - Uni Mitsubishi Pencil(Black)"
brand: "uni-ball"
price: "€ 32.95"
currency: EUR
in_stock: true
reviews_count: 7
category: "Uni Ball"
url: https://www.desertcart.hr/products/264692039-uni-ball-signo-dx-um-100-gel-ink-pen-0
store_origin: HR
region: Croatia
---

# Waterproof pigment ink ensures smudge-proof writing Uni-Flow system guarantees consistent ink flow till last drop 0.7mm tungsten carbide tip for smooth, precise lines Uni-ball Signo Dx Um-100 Gel Ink Pen - 0.5 Mm - 10 Pcs - Uni Mitsubishi Pencil(Black)

**Brand:** uni-ball
**Price:** € 32.95
**Availability:** ✅ In Stock

## Summary

> 🖋️ Write Boldly, Finish Strong – The Pen That Means Business

## Quick Answers

- **What is this?** Uni-ball Signo Dx Um-100 Gel Ink Pen - 0.5 Mm - 10 Pcs - Uni Mitsubishi Pencil(Black) by uni-ball
- **How much does it cost?** € 32.95 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/264692039-uni-ball-signo-dx-um-100-gel-ink-pen-0)

## 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

- • **Write Fearlessly:** Waterproof pigment ink keeps your notes crisp and smudge-free, rain or shine.
- • **Ink That Keeps Up:** Uni-Flow technology delivers a steady, uninterrupted ink flow—no skips, no blobs.
- • **Precision Meets Comfort:** Experience flawless 0.7mm line width with a tungsten carbide ball tip for ultra-smooth writing.
- • **Trusted for Over a Decade:** A decade-long favorite among professionals who demand reliability and style.
- • **See Your Ink, Plan Your Next Move:** Transparent barrel lets you track ink levels so you’re never caught off guard.

## Overview

The Uni-ball Signo Dx UM-100 Gel Ink Pen features a 0.7mm tungsten carbide tip delivering smooth, precise lines with waterproof pigment ink. Its patented Uni-Flow system ensures consistent ink flow until the last drop, while the transparent barrel allows easy ink level monitoring. Trusted by professionals for over 10 years, this refillable rollerball pen combines durability and style for everyday excellence.

## 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.

Review: Wrong description - Although the pen is described as 0.5mm, it is 0.7mm.
Review: 0.7 mm - The ball size for the pen is 0.7 mm not 0.5 mm which makes the font size wider and uncomfortable for me.

## 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 |
| Age range (description) | Kid |
| Animal Theme | No animal theme |
| Best Sellers Rank | #41,267 in Office Products ( See Top 100 in Office Products ) #139 in Rollerball Pens |
| Body Shape | Round |
| Brand | uni-ball |
| Brand Name | uni-ball |
| Closure Type | Snap |
| Color | Blue |
| Colour | Blue |
| Customer Reviews | 4.2 out of 5 stars 126 Reviews |
| Drill Point | Extra Fine |
| Grip Type | Smooth |
| Hand Orientation | Ambidextrous |
| Included Components | Dbmier A750 Mini Notebook |
| Ink Base | Water |
| Ink Color | Blue |
| Ink colour | Blue |
| Item Diameter | 0.5 Millimeters |
| Item Dimensions | 15.8 x 6 x 3 centimeters |
| Item Weight | 12 Grams |
| Line Size | 0.5mm |
| Manufacturer | Uniball |
| Material | Plastic |
| Material Type | Plastic |
| Model Name | Um 100 |
| Model Number | BC30647 |
| Pattern | Solid |
| Recommended Uses For Product | Writing |
| Style | Refillable |
| Subject Character | Plain |
| Theme | No theme |
| UPC | 701936337238 |
| Water Resistance Level | Waterproof |
| Writing Instrument Form | Roller Ball Pen |
| Writing instrument form | Roller Ball Pen |

## Product Details

- **Age range (description):** Kid
- **Brand:** uni-ball
- **Colour:** Blue
- **Ink colour:** Blue
- **Writing instrument form:** Roller Ball Pen

## Images

![Uni-ball Signo Dx Um-100 Gel Ink Pen - 0.5 Mm - 10 Pcs - Uni Mitsubishi Pencil(Black) - Image 1](https://m.media-amazon.com/images/I/81acTpU47oL.jpg)
![Uni-ball Signo Dx Um-100 Gel Ink Pen - 0.5 Mm - 10 Pcs - Uni Mitsubishi Pencil(Black) - Image 2](https://m.media-amazon.com/images/I/71JK+lPMR6L.jpg)
![Uni-ball Signo Dx Um-100 Gel Ink Pen - 0.5 Mm - 10 Pcs - Uni Mitsubishi Pencil(Black) - Image 3](https://m.media-amazon.com/images/I/61thqTqgvNL.jpg)
![Uni-ball Signo Dx Um-100 Gel Ink Pen - 0.5 Mm - 10 Pcs - Uni Mitsubishi Pencil(Black) - Image 4](https://m.media-amazon.com/images/I/61CVd9eoa3L.jpg)
![Uni-ball Signo Dx Um-100 Gel Ink Pen - 0.5 Mm - 10 Pcs - Uni Mitsubishi Pencil(Black) - Image 5](https://m.media-amazon.com/images/I/61ltJCzq8xL.jpg)

## Questions & Answers

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

## Customer Reviews

### ⭐⭐ Wrong description
*by J***P on 15 February 2024*

Although the pen is described as 0.5mm, it is 0.7mm.

### ⭐⭐ 0.7 mm
*by Z***O on 1 October 2023*

The ball size for the pen is 0.7 mm not 0.5 mm which makes the font size wider and uncomfortable for me.

### ⭐⭐⭐⭐⭐ Excellent pen and a great value!
*by V***Y on 22 February 2026*

Writes well, good color of ink; and it will last a long time unlike some pens.

## 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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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-07-17*