---
product_id: 161527437
title: "Signo Um-100 Gel Ink Pen - 0.5 Mm -10 Pcs (Blue)"
brand: "uni-ball"
price: "A$120"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/161527437-signo-um-100-gel-ink-pen-0-5-mm-10
store_origin: AU
region: Australia
---

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

**Brand:** uni-ball
**Price:** A$120
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Signo Um-100 Gel Ink Pen - 0.5 Mm -10 Pcs (Blue) by uni-ball
- **How much does it cost?** A$120 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/161527437-signo-um-100-gel-ink-pen-0-5-mm-10)

## 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:** Stainless-steel tip with tungsten carbide ball guarantees durability and a premium writing experience.
- • **Write Without Limits:** Uni-Flow system ensures smooth, consistent ink flow until the very last drop—no skips, no smudges.
- • **Trusted by Professionals:** A decade-long favorite crafted in Japan by Mitsubishi Pencil Co., blending reliability with style.
- • **Precision in Every Stroke:** Micro 0.5mm tip delivers ultra-fine 0.3mm lines for flawless writing and detailed notes.
- • **Stay Ahead with Transparency:** See-through ink barrel keeps you informed on ink levels, so you’re never caught off guard.

## Overview

The Uni-Ball Signo UM-100 Gel Ink Pen features a micro 0.5mm tip that writes ultra-fine 0.3mm lines with waterproof pigment ink. Engineered in Japan, it boasts a stainless-steel tip with a tungsten carbide ball and a Uni-Flow system for smooth, consistent ink delivery. Its transparent barrel lets you monitor ink levels, making it a trusted choice for professionals seeking precision and reliability.

## Description

Signo Um-100 Gel Ink Pen - 0.5 Mm -10 Pcs (Blue)

## 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 |
|---------------|-------|
| Manufacturer | Uni-ball |
| Brand | uni-ball |
| Model Number | BC30647 |
| Product Dimensions | 15.8 x 6 x 3 cm; 12 g |
| Colour | Blue |
| Grip Type | Ergonomic Grip |
| Material Type | Plastic |
| Point Type | Extra Fine |
| Line Size | 0.5mm |
| Ink Colour | Blue |
| Manufacturer Part Number | 4902778947081 |
| Item Weight | 12 g |

## Product Details

- **Brand:** uni-ball
- **Writing instrument form:** Roller Ball Pen
- **Colour:** Blue
- **Ink colour:** Blue
- **Age range (description):** Adult
- **Material:** Plastic
- **Point type:** Extra Fine
- **Special feature:** Waterproof
- **Model name:** Um 100
- **Item dimensions L x W x H:** 15.8 x 6 x 3 centimetres

## Images

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

## 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.com.au/products/161527437-signo-um-100-gel-ink-pen-0-5-mm-10](https://www.desertcart.com.au/products/161527437-signo-um-100-gel-ink-pen-0-5-mm-10)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-01*