---
product_id: 414460755
title: "GSM Dumanhill Octane Gel Refill with Blue Ink - Pack of 20 Refills"
brand: "classmate"
price: "¥741"
currency: JPY
in_stock: true
reviews_count: 5
category: "Classmate"
url: https://www.desertcart.jp/products/414460755-gsm-dumanhill-octane-gel-refill-with-blue-ink-pack-20
store_origin: JP
region: Japan
---

# Smooth medium tip writing Waterproof Japanese ink 20-pack gel refills GSM Dumanhill Octane Gel Refill with Blue Ink - Pack of 20 Refills

**Brand:** classmate
**Price:** ¥741
**Availability:** ✅ In Stock

## Summary

> 🖋️ Elevate your writing game with every refill—because your ideas deserve the best!

## Quick Answers

- **What is this?** GSM Dumanhill Octane Gel Refill with Blue Ink - Pack of 20 Refills by classmate
- **How much does it cost?** ¥741 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/414460755-gsm-dumanhill-octane-gel-refill-with-blue-ink-pack-20)

## Best For

- classmate enthusiasts

## Why This Product

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

## Key Features

- • **Bulk Pack Efficiency:** Get 20 high-quality gel refills in one go—never run out during your busiest workdays.
- • **Trusted Brand Quality:** Classmate’s renowned durability and material excellence guarantee long-lasting performance.
- • **Premium Waterproof Ink:** Experience smudge-proof, fade-resistant blue ink crafted with advanced Japanese technology.
- • **Effortless Smooth Writing:** Medium gel tip ensures flawless, consistent strokes for professional note-taking and signing.
- • **Perfect for Professionals:** Ideal refill for managers and millennials who demand reliability and style in every pen stroke.

## Overview

Classmate GSM Dumanhill Octane Gel Refill pack offers 20 smooth-writing, medium-tip gel refills with waterproof blue ink made from premium Japanese materials. Designed for professionals seeking reliable, smudge-proof performance, these refills ensure consistent quality and value for everyday office and personal use.

## Description

The Gel Refill comes with Blue Ink and in Pack of 20 pieces.

Review: Nice product value of money ,this product qwality is good and smooth in writing I am very happy and satisfied this product thank you...
Review: Very useful

## Features

- Classmate uses high quality material
- Classmate brand pen consist of high quality material.
- Waterproof japanese ink

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07H172RGP |
| Best Sellers Rank | #28,074 in Office Products ( See Top 100 in Office Products ) #231 in Pen Refills |
| Brand | Classmate |
| Customer Reviews | 4.4 4.4 out of 5 stars (155) |
| Date First Available | 28 April 2021 |
| Ink Color | Black |
| Item Weight | 50 g |
| Manufacturer | Classmate |
| Manufacturer Part Number | 72 |
| Material Type | Plastic |
| Model number | 7u |
| Number of Items | 1 |
| Point Type | Medium |
| Product Dimensions | 17 x 1 x 1 cm; 50 g |
| Size | 5 Count (Pack of 1) |
| Tip Type | gel |

## Product Details

- **Brand:** Classmate
- **Item dimensions L x W x H:** 17 x 1 x 1 centimeters
- **Item weight:** 0.05 Kilograms
- **Number of pieces:** 20
- **Style:** Pack of 1

## Images

![GSM Dumanhill Octane Gel Refill with Blue Ink - Pack of 20 Refills - Image 1](https://m.media-amazon.com/images/I/51n58QKYISL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***I on 20 June 2022*

Nice product value of money ,this product qwality is good and smooth in writing I am very happy and satisfied this product thank you...

### ⭐⭐⭐⭐⭐ Review
*by S***A on 7 February 2025*

Very useful

### ⭐⭐⭐⭐⭐ Review
*by A***R on 2 June 2023*

Value for money

## Frequently Bought Together

- Classmate GSM Dumanhill Octane Gel Refill with Blue Ink - Pack of 20 Refills
- Classmate Octane Gel 25s Jar- 20 Blue Gel Pens + 5 Black Gel Pens
- Classmate Octane Neon Blue Gel Pens, Multicolor, Pack of 5

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**Shop now:** [https://www.desertcart.jp/products/414460755-gsm-dumanhill-octane-gel-refill-with-blue-ink-pack-20](https://www.desertcart.jp/products/414460755-gsm-dumanhill-octane-gel-refill-with-blue-ink-pack-20)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-10*