---
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: "123 Lei"
currency: RON
in_stock: true
reviews_count: 7
category: "Uni Ball"
url: https://www.desertcart.ro/products/264692039-uni-ball-signo-dx-um-100-gel-ink-pen-0
store_origin: RO
region: Romania
---

# Waterproof pigment gel ink Uni-Flow system for smooth, consistent writing 0.5mm micro tip for precision Uni-ball Signo Dx Um-100 Gel Ink Pen - 0.5 Mm - 10 Pcs - Uni Mitsubishi Pencil(Black)

**Brand:** uni-ball
**Price:** 123 Lei
**Availability:** ✅ In Stock

## Summary

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

## 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?** 123 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/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

- • **Built to Last:** Durable stainless-steel tip with tungsten carbide ball for consistent performance and longevity.
- • **Trusted Classic:** A decade-long favorite among professionals, combining reliability with sleek design.
- • **Stay In The Know:** Transparent barrel design lets you monitor ink levels, so you’re never caught off guard.
- • **Write Without Limits:** Uni-Flow ink system ensures a continuous, smooth flow to the very last drop—no skips, no smudges.
- • **Precision in Every Stroke:** Micro 0.5mm tip delivers ultra-fine 0.3mm lines for crisp, professional writing.

## Overview

The Uni-ball Signo Dx UM-100 Gel Ink Pen features a 0.5mm micro tip that writes ultra-fine 0.3mm lines using waterproof pigment gel ink. Its patented Uni-Flow system guarantees smooth, uninterrupted ink flow, while the stainless-steel tip with tungsten carbide ball ensures durability. The transparent barrel allows easy ink level monitoring. Sold in a pack of 10, this pen is a trusted choice for professionals seeking precision and reliability.

## 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 |
| Best Sellers Rank | #52,563 in Office Products ( See Top 100 in Office Products ) #141 in Rollerball Pens |
| Brand | uni-ball |
| Closure | Snap |
| Color | Blue |
| Customer Reviews | 4.1 4.1 out of 5 stars (125) |
| Date First Available | 10 May 2014 |
| Grip Type | Smooth |
| Ink Color | Blue |
| Item Weight | 12 g |
| Line Size | 0.5mm |
| Manufacturer | Uniball |
| Manufacturer Part Number | 4902778947081 |
| Material Type | Plastic |
| Model number | BC30647 |
| Number of Items | 10 |
| Point Type | Extra Fine |
| Product Dimensions | 15.8 x 6 x 3 cm; 12 g |
| Size | 10 Count (Pack of 1) |

## 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)

## 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.

### ⭐⭐⭐⭐⭐ 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.

## 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.ro/products/264692039-uni-ball-signo-dx-um-100-gel-ink-pen-0](https://www.desertcart.ro/products/264692039-uni-ball-signo-dx-um-100-gel-ink-pen-0)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-01-23*