---
product_id: 549676722
title: "Mitsubishi Pencil Uni-Ball One Gel Ballpoint Pen Refill, 0.38, Black, 10 Pieces, Hako UMR38S.24"
brand: "三菱鉛筆"
price: "79 zł"
currency: PLN
in_stock: true
reviews_count: 8
category: "三菱鉛筆"
url: https://www.desertcart.pl/products/549676722-mitsubishi-pencil-uni-ball-one-gel-ballpoint-pen-refill-0
store_origin: PL
region: Poland
---

# Quick-drying, no smudge ink Darker, vivid black pigment 0.38mm ultra-fine tip Mitsubishi Pencil Uni-Ball One Gel Ballpoint Pen Refill, 0.38, Black, 10 Pieces, Hako UMR38S.24

**Brand:** 三菱鉛筆
**Price:** 79 zł
**Availability:** ✅ In Stock

## Summary

> 🖋️ Write sharper, faster, darker — never miss a beat with Uni-Ball One.

## Quick Answers

- **What is this?** Mitsubishi Pencil Uni-Ball One Gel Ballpoint Pen Refill, 0.38, Black, 10 Pieces, Hako UMR38S.24 by 三菱鉛筆
- **How much does it cost?** 79 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/549676722-mitsubishi-pencil-uni-ball-one-gel-ballpoint-pen-refill-0)

## Best For

- 三菱鉛筆 enthusiasts

## Why This Product

- Trusted 三菱鉛筆 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Memorable, Darker Ink:** Innovative pigment technology delivers a richer black that makes your writing stand out and stick in memory.
- • **Seamless Compatibility:** Fits perfectly with Uni-ball One pens, extending your favorite pen’s life without compromise.
- • **Smudge-Free Confidence:** Quick-drying gel ink ensures your work stays clean and sharp—no more embarrassing smears.
- • **Value Pack for Power Users:** 10 high-quality refills to keep you writing through meetings, brainstorming, and beyond.
- • **Precision Writing, Every Time:** Experience ultra-fine 0.38mm tip for crisp, professional notes and flawless detail.

## Overview

The Mitsubishi Pencil Uni-Ball One Gel Ballpoint Pen Refill offers a 0.38mm ultra-fine tip with quick-drying, smudge-resistant gel ink that produces darker, more vibrant black text. Designed for seamless compatibility with Uni-ball One pens, this 10-pack refill set is perfect for professionals seeking precision, durability, and a premium writing experience that leaves a lasting impression.

## Description

This gel ink ballpoint pen uses new technology bead pack pigments to write darker text and proven to be memorable. "Notebook, crisp and crisp. uni-ball one 1: Black is darker and the colors are more vibrant, and the black color is darker than the general gel ink that can be easily remembered and clearly written letters. In collaboration with Ritsaikan University, we have found that black color can be easily remembered as darker and crisp letters. You can write letters that are easy to leave impressions when you return the notebook. 2: Non-smearing, quick-drying, "UniBall One Ink" changes the ratio of the solids and liquid content in the ink, allowing liquid ingredients to be absorbed into the paper surface of the paper, while still leaving a solid color material on the paper. Quick-drying ink that penetrates quickly to the surface of the paper, yet does not bleed through and bleed through. 3: The ink color hidden by the red sheet is also available for those who are learning memory with a line-up/memorization red sheet, and the 0.38mm includes 3 colors, orange, baby pink, yellow, 0.5mm, orange, and yellow with a red sheet for memory. Product Name: Mitsubishi Pencil Gel Ballpoint Pen Refill, Uni-Ball One, 0.38 one, Black, 10 Leads

Review: Love these pen refills the best! - Love these refilled they are an excellent value for your dollar and fit perfectly in my uniball ball point pen. I love that they are .38 mm. I only wish they held more ink. I use them for EVERYTHING and do a lot of Bible study, sermon notes, and other writings. The ink flow is amazing the the quality and durability are great. I think of 2-3 purchases I had issues with one of them. All others have worked fine. These are my go to pen refills. I love the design and know that they fit my pens. If you love writing with a great pen and like very fine tips these are the best
Review: Can use with many version - The work with both the small and tall pens from uniball. Great quality pens and these refills make it so that i can keep using them without have to throw them and buy.

## Features

- Series: Uni-ball one
- Features: Black is darker and the colors are more vibrant, making it easy to remember and write crisp letters
- Compatible products: UMN-S-38 (uni-ball one 0.01 inch (0.38 mm)
- Lead diameter: 0.01 inches (0.38 mm); Ink color: Black
- Size: Shaft Diameter 0.2 x Thickness 0.2 x Total Length 4.4 inches (6.0 x 6.0 x 112.0 mm); Weight: 1.4 oz (42 g)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08665S5YT |
| Age Range (Description) | All Ages |
| Age Range Description | All Ages |
| Best Sellers Rank | #13,493 in Office Products ( See Top 100 in Office Products ) #118 in Ink Pen Refills |
| Brand | 三菱鉛筆 |
| Brand Name | 三菱鉛筆 |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 751 Reviews |
| Drill Point | Extra Fine |
| Grip Type | smooth |
| Ink Base | Pigment |
| Ink Color | Black |
| Item Diameter | 0.2 Inches |
| Item Dimensions | 4.41 x 0.24 x 0.24 inches |
| Item Height | 0.6 centimeters |
| Item Type Name | Gel Ink Ballpoint Pen |
| Item Weight | 23 Grams |
| Line Size | 0_3mm |
| Manufacturer | 三菱鉛筆(Mitsubishi Pencil) |
| Material | Plastic |
| Material Type | Plastic |
| Model Name | ユニボールone |
| Model Number | ハコUMR38S.24 |
| Pattern | Single Item |
| Style | Refill |
| Unit Count | 10 Count |
| Writing Instrument Form | Ballpoint Pen |

## Product Details

- **Brand:** 三菱鉛筆
- **Writing Instrument Form:** Ballpoint Pen
- **Color:** Black
- **Ink Color:** Black
- **Age Range (Description):** All Ages

## Images

![Mitsubishi Pencil Uni-Ball One Gel Ballpoint Pen Refill, 0.38, Black, 10 Pieces, Hako UMR38S.24 - Image 1](https://m.media-amazon.com/images/I/71iDaePS-tL.jpg)

## Available Options

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

## Questions & Answers

**Q: do you also sell ink refills for these pens? I'm looking for blue**
A: These pens do not write well at all.

**Q: How do these compare to Tül pens?**
A: Well TUL has a larger ball base than the UNI. I find a thinner base more functional

**Q: Does the ink show up on black paper or is it just for white paper?**
A: Just for white, I have been looking for a milky equivalent. I keep hoping they will make some :) since these are my favorite.

**Q: Is the ink archival and waterproof?**
A: As far as I can tell yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ Love these pen refills the best!
*by J***H on November 23, 2025*

Love these refilled they are an excellent value for your dollar and fit perfectly in my uniball ball point pen. I love that they are .38 mm. I only wish they held more ink. I use them for EVERYTHING and do a lot of Bible study, sermon notes, and other writings. The ink flow is amazing the the quality and durability are great. I think of 2-3 purchases I had issues with one of them. All others have worked fine. These are my go to pen refills. I love the design and know that they fit my pens. If you love writing with a great pen and like very fine tips these are the best

### ⭐⭐⭐⭐⭐ Can use with many version
*by H***. on January 7, 2026*

The work with both the small and tall pens from uniball. Great quality pens and these refills make it so that i can keep using them without have to throw them and buy.

### ⭐⭐⭐⭐⭐ Refills so many of my favourite pens
*by R***E on October 30, 2025*

Some of my favourite pens have refills! I love my Uni-Ball pens. The fine tip and smooth writing means I always have one with me. Being refillable is a big plus for me and it fits in both the full size pen and the shorter pen. Refills cuts down on plastic waste so I don't always have to buy new pens.

## Frequently Bought Together

- Mitsubishi Pencil Uni-Ball One Gel Ballpoint Pen Refill, 0.38, Black, 10 Pieces, Hako UMR38S.24
- Mitsubishi Pencil UMNSP38.52 Gel Ballpoint Pen Uni-Ball One P 0.38 Huka
- Mitsubishi Pencil Uni-Ball One Gel Ballpoint Pen Refill, 0.5, Black, 10 Pieces, Hako UMR05S.24

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-02-01*