---
product_id: 150904748
title: "40Pcs Black Rubber O-Rings for M2 and Wancai Fountain Pen, 6x5x0.5mm, 40 Count"
brand: "bobby pen"
price: "548321₫"
currency: VND
in_stock: true
url: https://www.desertcart.vn/products/150904748-40pcs-black-rubber-o-rings-for-m2-and-wancai-fountain
store_origin: VN
region: Vietnam
---

# Leak-proof design Custom fit for M2 & WanCai Size: 6*5*0.5mm 40Pcs Black Rubber O-Rings for M2 and Wancai Fountain Pen, 6x5x0.5mm, 40 Count

**Brand:** bobby pen
**Price:** 548321₫
**Availability:** ✅ In Stock

## Summary

> 🖊️ Write Without Worry: Elevate Your Writing Game!

## Quick Answers

- **What is this?** 40Pcs Black Rubber O-Rings for M2 and Wancai Fountain Pen, 6x5x0.5mm, 40 Count by bobby pen
- **How much does it cost?** 548321₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/150904748-40pcs-black-rubber-o-rings-for-m2-and-wancai-fountain)

## Best For

- bobby pen enthusiasts

## Why This Product

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

## Key Features

- • **Value Pack:** Includes 40 pieces, ensuring you have plenty of spares for all your writing needs.
- • **Durable Material:** Crafted from high-quality materials for long-lasting performance.
- • **Easy Installation:** Quick and hassle-free installation, so you can get back to writing in no time.
- • **Say Goodbye to Leaks!:** Engineered to prevent ink leakage, ensuring a smooth writing experience.
- • **Perfect Fit for Your Pens:** Custom-designed O-rings specifically for Majohn M2 and WanCai fountain pens.

## Overview

This set of 40 custom O-rings is designed specifically for Majohn M2 and WanCai fountain pens, measuring 6*5*0.5mm. They provide a reliable solution to prevent ink leakage and ensure a perfect fit, enhancing your writing experience.

## Description

Bobby Pen 40Pcs Black Rubber O-Rings for M2 and Wancai Fountain Pen, 6x5x0.5mm, 40 Count

## Features

- Do u worry leaking? Do u worry ur o-rings loosing? oh, now I custom some o-rings, they will solve ur problem.
- For M2 and wancai pen
- Size: 6*5*0.5mm

## Images

![40Pcs Black Rubber O-Rings for M2 and Wancai Fountain Pen, 6x5x0.5mm, 40 Count - Image 1](https://m.media-amazon.com/images/I/61WJ9CFYRDL.jpg)

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**Shop now:** [https://www.desertcart.vn/products/150904748-40pcs-black-rubber-o-rings-for-m2-and-wancai-fountain](https://www.desertcart.vn/products/150904748-40pcs-black-rubber-o-rings-for-m2-and-wancai-fountain)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-04-25*