---
product_id: 413990358
title: "ECO Fountain Pen Black M nib"
brand: "twsbi"
price: "NT$4388"
currency: TWD
in_stock: true
reviews_count: 6
category: "Twsbi"
url: https://www.desertcart.tw/products/413990358-eco-fountain-pen-black-m-nib
store_origin: TW
region: Taiwan
---

# Inner cap ensures perfect seal Multiple nib sizes for tailored writing Piston filler for smooth ink flow ECO Fountain Pen Black M nib

**Brand:** twsbi
**Price:** NT$4388
**Availability:** ✅ In Stock

## Summary

> 🖋️ Write your legacy with every stroke.

## Quick Answers

- **What is this?** ECO Fountain Pen Black M nib by twsbi
- **How much does it cost?** NT$4388 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/413990358-eco-fountain-pen-black-m-nib)

## Best For

- twsbi enthusiasts

## Why This Product

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

## Key Features

- • **Secure Seal Technology:** Inner cap locks in moisture, preventing ink from drying out—your pen stays fresh and reliable.
- • **Beginner to Pro Approved:** Trusted by novices and experts alike, this pen delivers smooth, consistent lines that elevate your everyday notes.
- • **Effortless Ink Refilling:** Piston filler mechanism lets you refill quickly and mess-free, so you’re always ready to write.
- • **Sleek, Professional Design:** Classic black resin body with a cap that posts securely for balanced, comfortable writing all day.
- • **Customizable Writing Experience:** Choose from EF, F, M, B, or Stub 1.1 nibs to match your unique style and precision needs.

## Overview

The ECO Fountain Pen Black M nib by TWSBI is a lightweight, resin-bodied piston filler pen featuring a secure inner cap seal and multiple nib size options. Designed for both beginners and professionals, it offers smooth, customizable writing with quick ink refills and a sleek, balanced design.

## Description

Comes in EF, F, M, B, Stub1.1 nib choices Piston Filler Fountain pen. Simply unscrew the end cap, dip into ink, screw back the end cap, and your done! Ready to write!! Pen cap has an inner cap to insure a perfect seal when stored away. Made for the beginner who just wants to try out fountain pens, all the way to the experts. A good everyday worker.

Review: Quick delivery - It’s a standard Twsbi pen and it arrived quickly with no issues on Qlty
Review: No conocía esta marca , pero tengo que decir que entra dentro de las mejores plumas que he utilizado . Su escritura es muy suave y siempre responde cuando la necesitas . Muy buena forma de carga y no se sale la tinta . Doy 5 estrellas porque no hay 6 . Muy buen producto

## Features

- Piston Filler Fountain Pen
- Pen cap is able to post onto the back of the pen
- Comes in EF, F, M, B, or stub1.1 nib size choices.
- Inner cap to insure a perfect seal when pen is capped
- Black, Clear demonstrator

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B011M8AI7S |
| Best Sellers Rank | #68,212 in Office Products ( See Top 100 in Office Products ) #656 in Fountain Pens |
| Brand | TWSBI |
| Closure | Screw |
| Color | black |
| Customer Reviews | 4.7 4.7 out of 5 stars (480) |
| Date First Available | 26 November 2015 |
| Grip Type | Smooth |
| Ink Color | Multicolor |
| Item Weight | 20 g |
| Line Size | 0_9mm |
| Manufacturer | TWSBI |
| Manufacturer Part Number | TW100003 |
| Material Type | Resin |
| Model number | TW100003 |
| Number of Items | 1 |
| Pencil Lead Degree (Hardness) | F |
| Point Type | Medium |
| Product Dimensions | 13.8 x 0.8 x 0.8 cm; 20 g |
| Size | 1 count (Pack of 1) |

## Product Details

- **Age range (description):** Adult
- **Brand:** TWSBI
- **Colour:** black
- **Ink colour:** Multicolor
- **Writing instrument form:** Fountain Pen

## Images

![ECO Fountain Pen Black M nib - Image 1](https://m.media-amazon.com/images/I/51O3MsXY1uL.jpg)

## Questions & Answers

**Q: Does this pen use the Diamond 50 Ink Bottle?**
A: Sorry, I refill my Twisbi from a regular Noodlers Ink bottle.  I suggest you contact Twisbi for a definitive answer.

**Q: How is this pen for getting used to if you are new to writing with a FP?**
A: The TWSBI ECO is a great pen.  I use it for drawing as well as writing.  The pen is a joy to use and you should have no difficulty with it.

**Q: Is it worth buying this pen? Should I wait and save money for a different pen or is this pen worth the price for how it writes**
A: You should definitely buy this pen.  It writes beautifully.  I am very satisfied with my purchase and this is one of my favorite pens that I write with.

**Q: does it need an ink cartridge?**
A: It cannot use an ink cartridge. You must have a bottle of ink. 

It is what's called a piston filler. You draw ink up into the pen barrel from a bottle of ink. 

For some ink brands on Amazon, check out Noodler's Inks and Diamine inks. 

Hope that helps!

## Customer Reviews

### ⭐⭐⭐⭐ Quick delivery
*by A***L on 26 February 2024*

It’s a standard Twsbi pen and it arrived quickly with no issues on Qlty

### ⭐⭐⭐⭐⭐ Review
*by M***D on 14 May 2023*

No conocía esta marca , pero tengo que decir que entra dentro de las mejores plumas que he utilizado . Su escritura es muy suave y siempre responde cuando la necesitas . Muy buena forma de carga y no se sale la tinta . Doy 5 estrellas porque no hay 6 . Muy buen producto

### ⭐⭐⭐⭐⭐ Review
*by G***I on 21 December 2020*

Conoscevo il marchio ma non avevo ancora posseduto una delle loro penne, beh devo dire che è una bella penna; non è piccola e nonostante il materiale sia prevalentemente plastica, non è neanche troppo leggera, ha la giusta consistenza. Il pennino "M" scorre molto bene ed ha un flusso anche troppo abbondante, scrive sempre. Speriamo che sia un prodotto durevole nel tempo, visto l'abbondanza della plastica. Al momento soddisfatto dell'acquisto. Il venditore è stato molto puntuale ed il materiale è arrivato adeguatamente imballato, ottimo acquisto.

## Frequently Bought Together

- TWSBI ECO Fountain Pen Black M nib
- Platinum Carbon Ink Bottle 60ml - Black

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-01-26*