---
product_id: 17397520
title: "ECO Fountain Pen Black EF nib"
brand: "twsbi"
price: "$118"
currency: NZD
in_stock: true
reviews_count: 10
category: "Twsbi"
url: https://www.desertcart.nz/products/17397520-eco-fountain-pen-black-ef-nib
store_origin: NZ
region: New Zealand
---

# Sleek black acrylic body Fully dismantlable for maintenance Piston filler ink system ECO Fountain Pen Black EF nib

**Brand:** twsbi
**Price:** $118
**Availability:** ✅ In Stock

## Summary

> 🖋️ Elevate your everyday writing—because your ideas deserve the smoothest flow.

## Quick Answers

- **What is this?** ECO Fountain Pen Black EF nib by twsbi
- **How much does it cost?** $118 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/17397520-eco-fountain-pen-black-ef-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

- • **Durable & Maintainable:** Easily dismantle the pen to clean and grease the piston, ensuring smooth performance for years.
- • **Effortless Ink Refills:** Piston filling mechanism lets you load ink quickly and cleanly—no cartridges needed.
- • **Perfect Seal Technology:** Inner cap guarantees airtight closure, preventing ink from drying out during storage.
- • **Customizable Writing Experience:** Choose from 5 nib sizes (EF, F, M, B, Stub 1.1) to match your unique style and precision needs.
- • **Timeless Design with Modern Edge:** Black acrylic body with a cap that posts securely for balanced, comfortable writing all day.

## Overview

The TWSBI ECO Fountain Pen in Black with an Extra Fine nib combines a high-capacity piston filling system with a durable acrylic body and customizable nib options. Designed for both beginners and experts, it features an airtight inner cap seal and is fully dismantlable for easy maintenance, delivering a smooth, reliable writing experience that improves with use.

## 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: Has Held Up Well - First of all, i have had this pen for over two years now and when i first got it the nib was not as smooth as i would have liked. I would write with it but i didn't really enjoy it. The more i wrote with it the smoother it got and it even turned a little wetter. Now it is perfect. Almost glassy smooth (On good paper) with a hind of feed back. I could write with this pen for days without stopping to if i really wanted to. It holds a massive ink capacity. The piston mechanism is extremely useful and if it ever get sticky you have the ability to dismantle the entire pen and grease up the piston (with the silicone grease that is included) and you are good to go. Even after two years of day to day use the acrylic of the pen barely has any wear on it at all. Only some micro scratches on the cap ring that can be removed with some polish and micro mesh. Over all the best fountain pen that you can get for $30. If you do have the budget to go a little higher i would also recommend the Faber Castell Loom which is an incredible value at $40.
Review: Lovely beginners pen - Amazing pen. I’ve owned it for a year now and it’s given me no issues. Easy to fill and clean, also great to write with.

## 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 | B011M858FK |
| Best Sellers Rank | #48,920 in Office Products ( See Top 100 in Office Products ) #175 in Fountain Pens |
| Brand | TWSBI |
| Closure | Screw |
| Color | Black, Clear |
| Customer Reviews | 4.5 4.5 out of 5 stars (402) |
| Date First Available | July 14, 2015 |
| Grip Type | smooth |
| Ink Color | Black |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.704 ounces |
| Item model number | TW100001 |
| Line Size | 0.3 Millimeters |
| Manufacturer | TWSBI |
| Manufacturer Part Number | TW100001 |
| Material Type | Acrylic, Stainless Steel |
| Number of Items | 1 |
| Package Dimensions | 6.38 x 2.13 x 0.79 inches |
| Pencil Lead Degree (Hardness) | F |
| Point Type | Extra Fine |
| Size | 1 Count (Pack of 1) |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** TWSBI
- **Color:** Black, Clear
- **Ink Color:** Black
- **Writing Instrument Form:** Fountain Pen

## Images

![ECO Fountain Pen Black EF nib - Image 1](https://m.media-amazon.com/images/I/41R+ndybfVL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Has Held Up Well
*by C***. on June 19, 2018*

First of all, i have had this pen for over two years now and when i first got it the nib was not as smooth as i would have liked. I would write with it but i didn't really enjoy it. The more i wrote with it the smoother it got and it even turned a little wetter. Now it is perfect. Almost glassy smooth (On good paper) with a hind of feed back. I could write with this pen for days without stopping to if i really wanted to. It holds a massive ink capacity. The piston mechanism is extremely useful and if it ever get sticky you have the ability to dismantle the entire pen and grease up the piston (with the silicone grease that is included) and you are good to go. Even after two years of day to day use the acrylic of the pen barely has any wear on it at all. Only some micro scratches on the cap ring that can be removed with some polish and micro mesh. Over all the best fountain pen that you can get for $30. If you do have the budget to go a little higher i would also recommend the Faber Castell Loom which is an incredible value at $40.

### ⭐⭐⭐⭐⭐ Lovely beginners pen
*by T***R on April 6, 2025*

Amazing pen. I’ve owned it for a year now and it’s given me no issues. Easy to fill and clean, also great to write with.

### ⭐⭐⭐⭐⭐ good intro to fountain pens
*by N***R on August 7, 2015*

having only used very cheap fountain pens previously, i was ready for a small step up. the piston filling was the deal maker for me, as i hated using cartridges before. it was worth the price bump vs the pilot and lamy entry level pens, imo. the pen wrote smooth out of the box. i do wish EF was a touch finer, but its not a problem. i would also prefer a larger grip, but its still comfortable to write with. im a male with "medium" hands, and can use the pen unposted. when posted, it felt top heavy, but ham-handed folk will likely appreciate the pen in this state. its super easy to fill, and i like being able to see the ink level. twsbi has excellent reviews for its other pens, and their newest offering looks to follow that trend.

## Frequently Bought Together

- TWSBI ECO Fountain Pen Black EF nib
- Platinum Carbon Ink Bottle 60ml - Black
- Noodler's Black Waterproof Fountain Pen Ink - Bulletproof,3 ounce

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-05*