---
product_id: 28909232
title: "Uni Signo RT1 Gel Ballpoint Pen Black Ink Refills, 0.28mm, Set of 4"
brand: "uni-ball"
price: "41.58 DT"
currency: TND
in_stock: true
category: "Uni Ball"
url: https://www.desertcart.tn/products/28909232-uni-signo-rt1-gel-ballpoint-pen-black-ink-refills-0
store_origin: TN
region: Tunisia
---

# Set of 4 convenient refills Deep black gel ink 0.28mm ultra-fine precision Uni Signo RT1 Gel Ballpoint Pen Black Ink Refills, 0.28mm, Set of 4

**Brand:** uni-ball
**Price:** 41.58 DT
**Availability:** ✅ In Stock

## Summary

> 🖊️ Write sharp, stay sharp—refill your edge.

## Quick Answers

- **What is this?** Uni Signo RT1 Gel Ballpoint Pen Black Ink Refills, 0.28mm, Set of 4 by uni-ball
- **How much does it cost?** 41.58 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/28909232-uni-signo-rt1-gel-ballpoint-pen-black-ink-refills-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

- • **Rich Black Gel Ink:** Smooth, fade-resistant ink ensures your writing stays bold and professional all day.
- • **Reliable Refill Pack:** Four refills keep you effortlessly stocked—never run out during critical moments.
- • **Trusted Brand Quality:** From Mitsubishi Pencil Co., a 4.6-star rated choice for discerning professionals.
- • **Ultra-Fine 0.28mm Tip:** Experience razor-sharp, precise lines that elevate your notes and signatures.
- • **Seamless Compatibility:** Perfectly designed for Uni Signo RT1 pens, guaranteeing flawless ink flow and fit.

## Overview

The Uni Signo RT1 Gel Ballpoint Pen Black Ink Refills offer ultra-fine 0.28mm tips with smooth, fade-resistant black gel ink. This set of four refills is engineered for seamless compatibility with Uni Signo RT1 pens, delivering consistent, professional-quality writing trusted by thousands of users.

## Description

Uni Signo RT1 Gel Ballpoint Pen Black Ink Refills, 0.28mm, Set of 4…

## Features

- Color : Black
- 0.28 mm
- 4 counts
- Refil for Uni ball Signo RT1 UMN-155N-28

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01E3FUWO6 |
| Brand Name | Uni-Ball |
| Customer Reviews | 4.6 4.6 out of 5 stars (134) |
| Ink Color | Black |
| Item Dimensions | 5.91 x 0.39 x 3.35 inches |
| Manufacturer | Mitsubishi Pencil Co., Ltd. |
| Manufacturer Part Number | UMR82.24/4p |
| Model Number | UMR82.24/4p |
| Number of Pieces | 4 |
| Point Type | Extra Fine |
| Style | Gel,Ballpoint |
| Unit Count | 4 Count |

## Product Details

- **Brand:** Uni-Ball
- **Item dimensions L x W x H:** 5.91 x 0.39 x 3.35 inches
- **Number of Pieces:** 4
- **Point Type:** Extra Fine
- **Style:** Gel,Ballpoint

## Images

![Uni Signo RT1 Gel Ballpoint Pen Black Ink Refills, 0.28mm, Set of 4 - Image 1](https://m.media-amazon.com/images/I/81qeL0DFZhL.jpg)
![Uni Signo RT1 Gel Ballpoint Pen Black Ink Refills, 0.28mm, Set of 4 - Image 2](https://m.media-amazon.com/images/I/31hCA3affEL.jpg)

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**Shop now:** [https://www.desertcart.tn/products/28909232-uni-signo-rt1-gel-ballpoint-pen-black-ink-refills-0](https://www.desertcart.tn/products/28909232-uni-signo-rt1-gel-ballpoint-pen-black-ink-refills-0)

---

*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-26*