---
product_id: 161527437
title: "Uni-Ball Signo Um-100 Gel Ink Pen - 0.5 Mm -10 Pcs (Blue)"
brand: "uni-ball"
price: "703 kr"
currency: DKK
in_stock: true
reviews_count: 5
category: "Uni Ball"
url: https://www.desertcart.dk/products/161527437-uni-ball-signo-um-100-gel-ink-pen-0-5
store_origin: DK
region: Denmark
---

# Transparent barrel shows ink level Waterproof pigment ink in vibrant blue 0.5mm micro tip for precision Uni-Ball Signo Um-100 Gel Ink Pen - 0.5 Mm -10 Pcs (Blue)

**Brand:** uni-ball
**Price:** 703 kr
**Availability:** ✅ In Stock

## Summary

> 🖋️ Write sharp, write smart—join the 10-year legacy of Uni-Ball Signo fans!

## 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?** 703 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/161527437-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

- • **Ink That Keeps Up:** Uni-Flow system ensures smooth, consistent ink flow to the very last drop—no skips, no smudges.
- • **Comfort Meets Style:** Ergonomic grip designed for long writing sessions without fatigue—because your ideas deserve the best.
- • **Precision at Your Fingertips:** Micro 0.5mm tip delivers ultra-fine 0.3mm lines for flawless writing and detailed notes.
- • **See Your Ink, Plan Your Next Move:** Transparent barrel lets you monitor ink levels so you’re never caught off guard.
- • **Crafted in Japan, Trusted Worldwide:** Made by Mitsubishi Pencil Co. with a tungsten carbide ball tip for durability and smooth glide.

## Overview

The Uni-Ball Signo UM-100 Gel Ink Pen features a precise 0.5mm micro tip that writes a crisp 0.3mm line using waterproof pigment ink. Its Uni-Flow system guarantees smooth, uninterrupted writing, while the transparent barrel lets you track ink levels easily. Made in Japan with a durable tungsten carbide ball tip and ergonomic grip, this pen is a trusted choice for professionals seeking reliability and style in every stroke.

## 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: I am using the Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm pens for over 20 years. They fit perfectly my hands and fingers. They write thin and don't leave any marks or ink on the paper. In plus, they have a nice color, be the blue, the red or black or black blue. I wish there were less of the same colour in a pack, and instead 3-4 colours in the same pack. I couldn't find them in any stationary shop only on desertcart and online. Anyway, I love them.
Review: Although the pen is described as 0.5mm, it is 0.7mm.

## Features

- 100% made in Japan by Mitsubishi Pencil Co.Ltd-Attached With Dbmier A750 Mini Notebook
- Stainless-steel tip with tungsten carbide ball. with 3 colours(black,blue,red).
- Micro 0.5mm tip ,writes a 0.3mm line.The see through ink barrel lets you see how much ink is left.
- High-quality and reliable rollerball featuring waterproof pigment ink and 'Uni-Flow' system to ensure a continuous consistent write to the last drop.
- User friendly,safe and comfortable to use.A favourite for over 10 years.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005644GKK |
| Best Sellers Rank | 706,079 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 7,568 in Gel Ink Rollerball Pens |
| Brand | uni-ball |
| Colour | Blue |
| Customer Reviews | 4.2 4.2 out of 5 stars (122) |
| Date First Available | 5 Dec. 2013 |
| Grip Type | Ergonomic Grip |
| Ink Colour | Blue |
| Item Weight | 12 g |
| Line Size | 0.5mm |
| Manufacturer | Uni-ball |
| Manufacturer Part Number | 4902778947081 |
| Material Type | Plastic |
| Model Number | BC30647 |
| Point Type | Extra Fine |
| Product Dimensions | 15.8 x 6 x 3 cm; 12 g |

## Product Details

- **Age range (description):** Adult
- **Brand:** uni-ball
- **Colour:** Blue
- **Ink colour:** Blue
- **Item dimensions L x W x H:** 15.8 x 6 x 3 centimetres
- **Material:** Plastic
- **Model name:** Um 100
- **Point type:** Extra Fine
- **Special feature:** Waterproof
- **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/61CVd9eoa3L.jpg)
![Uni-Ball Signo Um-100 Gel Ink Pen - 0.5 Mm -10 Pcs (Blue) - Image 2](https://m.media-amazon.com/images/I/61ltJCzq8xL.jpg)
![Uni-Ball Signo Um-100 Gel Ink Pen - 0.5 Mm -10 Pcs (Blue) - Image 3](https://m.media-amazon.com/images/I/61thqTqgvNL.jpg)
![Uni-Ball Signo Um-100 Gel Ink Pen - 0.5 Mm -10 Pcs (Blue) - Image 4](https://m.media-amazon.com/images/I/71JK+lPMR6L.jpg)
![Uni-Ball Signo Um-100 Gel Ink Pen - 0.5 Mm -10 Pcs (Blue) - Image 5](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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by Z***N on 2 December 2024*

I am using the Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm pens for over 20 years. They fit perfectly my hands and fingers. They write thin and don't leave any marks or ink on the paper. In plus, they have a nice color, be the blue, the red or black or black blue. I wish there were less of the same colour in a pack, and instead 3-4 colours in the same pack. I couldn't find them in any stationary shop only on Amazon and online. Anyway, I love them.

### ⭐⭐ Review
*by J***P on 15 February 2024*

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

### ⭐⭐⭐⭐ Review
*by B***R on 2 October 2024*

I got these after reading a recommendation and they do fit the bill. Nice pen, good for writing notes, journal, business etc, no spilling or smudging. Just one thing - these are the longest pens I've ever used, don't know why the barrel is so long, but I got the hang of it after an intial head-scratch. Recommended.

## 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 Denmark*
*Store origin: DK*
*Last updated: 2026-03-06*