---
product_id: 10764442
title: "uni Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black (UMN15538.24)"
brand: "三菱鉛筆"
price: "€ 11.82"
currency: EUR
in_stock: true
category: "三菱鉛筆"
url: https://www.desertcart.hr/products/10764442-uni-ball-signo-knock-ballpoint-pen-rt1-0-38mm-color
store_origin: HR
region: Croatia
---

# Water-resistant ink Sleek black color with rubber grip 0.38mm extra-fine precision uni Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black (UMN15538.24)

**Brand:** 三菱鉛筆
**Price:** € 11.82
**Availability:** ✅ In Stock

## Summary

> 🖊️ Write sharp, write smart — the pen that means business.

## Quick Answers

- **What is this?** uni Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black (UMN15538.24) by 三菱鉛筆
- **How much does it cost?** € 11.82 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/10764442-uni-ball-signo-knock-ballpoint-pen-rt1-0-38mm-color)

## 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

- • **Pinpoint Precision:** Experience flawless, sharp lines with the ultra-fine 0.38mm tip—perfect for detailed note-taking and professional ledger work.
- • **Smudge-Resistant Flow:** Enjoy smooth, fast-drying ink that keeps your documents crisp and clean, minimizing smears even during rapid writing.
- • **Ergonomic Comfort Grip:** Designed with a soft rubber grip for all-day writing comfort, supporting both right and left-handed users effortlessly.
- • **Reliable Water-Resistant Ink:** Keep your important notes safe from accidental spills with durable, water-resistant ink that stands the test of time.
- • **Sleek Professional Aesthetic:** Elevate your desk style with a minimalist, round black body that signals sophistication and focus.

## Overview

The Uni-Ball Signo Knock Ballpoint Pen RT1 features an ultra-fine 0.38mm tip delivering precise, clean lines with water-resistant ink. Its ergonomic rubber grip ensures comfortable writing for both right and left-handed users, while the sleek black design adds a professional touch to your workspace. Ideal for professionals who demand accuracy and style in every stroke.

## Description

Uni Uni-Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black

## Features

- Uni Knock Ballpoint Pen RT1
- Color Ink Knock Ballpoint Pen
- 0.38mm Point
- Product Dimensions 4.15 x 2.8 x 1.4 inches

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00B57W4QU |
| Additional Features | Erasable |
| Age Range Description | Teen |
| Best Sellers Rank | #50,600 in Office Products ( See Top 100 in Office Products ) #1,065 in Ballpoint Pens #1,286 in Gel Ink Pens |
| Body Shape | Round |
| Brand Name | 三菱鉛筆 |
| Closure Type | Snap |
| Color | Black |
| Customer Reviews | 4.3 4.3 out of 5 stars (852) |
| Drill Point | Extra Fine |
| Global Trade Identification Number | 04902778142653 |
| Grip Type | Rubber |
| Hand Orientation | Ambidextrous |
| Included Components | Ink Cartridge |
| Ink Base | Water |
| Ink Color | Black |
| Item Diameter | 15.4 millimeters |
| Item Weight | 4.54 g |
| Line Size | 0_3mm millimeters |
| Manufacturer | Uni |
| Material Type | Plastic |
| Model Name | Signo RT1 |
| Model Number | UMN15538.24 |
| Recommended Uses For Product | Writing |
| Style | 1 |
| UPC | 791836588878 |
| Unit Count | 1 Count |
| Water Resistance Level | Water Resistant |
| Writing Instrument Form | Ballpoint Pen |
| Writing Technique | ballpoint |

## Product Details

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

## Images

![uni Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black (UMN15538.24) - Image 1](https://m.media-amazon.com/images/I/61kfQZBdxnL.jpg)

## Available Options

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

## Frequently Bought Together

- Uni Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black (UMN15538.24)
- Uni Signo RT1 Gel Ballpoint Pen Black Ink Refills, 0.38mm, Set of 4

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**Shop now:** [https://www.desertcart.hr/products/10764442-uni-ball-signo-knock-ballpoint-pen-rt1-0-38mm-color](https://www.desertcart.hr/products/10764442-uni-ball-signo-knock-ballpoint-pen-rt1-0-38mm-color)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-11-15*