---
product_id: 19826654
title: "Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Black)"
brand: "uni-ball"
price: "¥3337"
currency: JPY
in_stock: true
category: "Uni Ball"
url: https://www.desertcart.jp/products/19826654-signo-um-100-gel-ink-pen-0-5-mm-10
store_origin: JP
region: Japan
---

# Refillable design Smooth gel ink flow 0.5 mm ultra-fine tip Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Black)

**Brand:** uni-ball
**Price:** ¥3337
**Availability:** ✅ In Stock

## Summary

> 🖋️ Write your success story with every smooth stroke!

## Quick Answers

- **What is this?** Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Black) by uni-ball
- **How much does it cost?** ¥3337 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/19826654-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

- • **Bold Black Ink:** Rich, water-based gel ink ensures vibrant, smudge-resistant lines
- • **Eco-Savvy Refill:** Refillable ink cartridges reduce waste and keep you writing longer
- • **Value Pack Power:** 10 pens in one set—never run out during your busiest workdays
- • **Comfort Meets Control:** Contoured grip designed for all-day ambidextrous use
- • **Precision in Every Stroke:** 0.5 mm fine tip for crisp, professional writing

## Overview

The Uni-ball Signo UM-100 Gel Ink Pen features a precise 0.5 mm fine tip and smooth, water-based black gel ink for clean, professional writing. Its refillable design and contoured grip offer sustainable comfort for both right- and left-handed users. This 10-pack ensures you stay stocked with a trusted, high-quality pen favored by professionals and students alike.

## Description

desertcart.com: Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Black) : Office Products

## Features

- You will receive 10 pens

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005642TAY |
| Additional Features | Refillable |
| Age Range Description | Kid |
| Best Sellers Rank | #104,508 in Office Products ( See Top 100 in Office Products ) #1,784 in Gel Ink Pens |
| Body Shape | Round |
| Brand Name | Uni-Ball |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (148) |
| Drill Point | Fine |
| Grip Type | Contoured |
| Hand Orientation | Ambidextrous |
| Included Components | 10 Uni-ball Signo UM-100 Gel Ink Pens |
| Ink Base | Water |
| Ink Color | Black |
| Item Dimensions | 0.35 x 5.94 x 5.94 inches |
| Item Weight | 0.27 g |
| Line Size | 0.5 millimeters |
| Manufacturer | uni Uni-ball |
| Material Type | Polypropylene |
| Model Number | E287545H |
| Style | Refillable |
| Unit Count | 10 Count |
| Writing Instrument Form | Roller Ball Pen |
| Writing Technique | gel ink |

## Product Details

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

## Images

![Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Black) - Image 1](https://m.media-amazon.com/images/I/31Boz1Nhx3L.jpg)

## Available Options

This product comes in different **Size** options.

## Frequently Bought Together

- Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Black)
- Uni-ball Signo Standard Gel Ink Ballpoint Pen UM-100 (UM100.64), Blue Black, 0.5mm, 6 pens per Pack (Japan Import) [Komainu-Dou Original Package]
- Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Blue)

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**Shop now:** [https://www.desertcart.jp/products/19826654-signo-um-100-gel-ink-pen-0-5-mm-10](https://www.desertcart.jp/products/19826654-signo-um-100-gel-ink-pen-0-5-mm-10)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-07*