---
product_id: 79718172
title: "TWSBI ECO Transparent Blue Fountain Pen F nib"
brand: "twsbi"
price: "€ 75.42"
currency: EUR
in_stock: false
reviews_count: 13
url: https://www.desertcart.sk/products/79718172-twsbi-eco-transparent-blue-fountain-pen-f-nib
store_origin: SK
region: Slovakia
---

# Transparent blue demonstrator barrel Multiple nib sizes (EF, F, M, B, Stub 1.1) Piston filler ink system TWSBI ECO Transparent Blue Fountain Pen F nib

**Brand:** twsbi
**Price:** € 75.42
**Availability:** ❌ Out of Stock

## Summary

> 🖋️ Write Boldly, See Clearly — The Pen That Keeps Up With You

## Quick Answers

- **What is this?** TWSBI ECO Transparent Blue Fountain Pen F nib by twsbi
- **How much does it cost?** € 75.42 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/79718172-twsbi-eco-transparent-blue-fountain-pen-f-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

- • **Everyday Elegance:** Smooth, reliable writing performance designed for professionals who demand consistency daily.
- • **Crystal Clear Cool:** Transparent blue barrel lets you monitor ink levels in real-time—never run dry unexpectedly.
- • **Ink Tank That Lasts:** Generous piston filler reservoir means fewer refills and uninterrupted flow.
- • **Secure Seal, Always Ready:** Inner cap ensures airtight closure, preserving ink freshness even after days of rest.
- • **Tailored Writing Experience:** Choose from five precision nib sizes to match your unique handwriting style.

## Overview

The TWSBI ECO Transparent Blue Fountain Pen features a piston filling system with a large ink reservoir visible through its clear blue demonstrator barrel. Available in five nib sizes including EF, F, M, B, and Stub 1.1, it offers a customizable writing experience. Its inner cap ensures a perfect seal to keep ink fresh, making it an ideal, smooth-writing pen for daily professional 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: Huge tank and smooth writer - Great pen. I love the large tank and it is a smooth writer. I never have any trouble getting the ink to flow even if it ends up sitting for a week or two.
Review: Daily Writer Superstar - One of the best fountain pens I have found as a daily writer. I have always carry a fountain pen as my daily pen because I have to document my activities in great detail. Of course, like most of us I run out of ink at the most inappropriate times. But now, I no longer have to stick cartridges in my truck, wife's car, my carry bag, my work desk, coat pockets, or other places around my work and home to ensure I have a ink cartridge ready when I need one. This pen holds a tremendous amount of ink with the ink level clearly shown since the barrel is clear. I ordered my ECO with a fine nib which seems to lean more towards a medium. A smooth writer on a variety of paper forms I complete each day. If you are looking for a workhorse pen you can use everyday I would recommend you give the ECO a try, I think its the best and most cost effective pen around if you write a lot during the day.

## 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
- Transparent Blue, Clear demonstrator

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07HG8862F |
| Best Sellers Rank | #146,651 in Office Products ( See Top 100 in Office Products ) #633 in Fountain Pens |
| Brand | TWSBI |
| Closure | Screw |
| Color | Blue |
| Customer Reviews | 4.7 4.7 out of 5 stars (252) |
| Date First Available | September 20, 2018 |
| Grip Type | Smooth |
| Ink Color | Not included |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.76 ounces |
| Item model number | TW100047 |
| Line Size | 0.3mm |
| Manufacturer | TWSBI |
| Manufacturer Part Number | TW100047 |
| Material Type | Metal, Plastic |
| Number of Items | 1 |
| Pencil Lead Degree (Hardness) | F |
| Point Type | Fine |
| Product Dimensions | 5.43 x 0.5 x 0.5 inches |
| Size | 1 Count (Pack of 1) |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** TWSBI
- **Color:** Blue
- **Ink Color:** Not included
- **Writing Instrument Form:** Fountain Pen

## Images

![TWSBI ECO Transparent Blue Fountain Pen F nib - Image 1](https://m.media-amazon.com/images/I/51Wtldv9GML.jpg)
![TWSBI ECO Transparent Blue Fountain Pen F nib - Image 2](https://m.media-amazon.com/images/I/51Y7K8UFgPL.jpg)
![TWSBI ECO Transparent Blue Fountain Pen F nib - Image 3](https://m.media-amazon.com/images/I/51sJIx00ogL.jpg)
![TWSBI ECO Transparent Blue Fountain Pen F nib - Image 4](https://m.media-amazon.com/images/I/51v9Pkz+lEL.jpg)
![TWSBI ECO Transparent Blue Fountain Pen F nib - Image 5](https://m.media-amazon.com/images/I/51wJHivoWML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Huge tank and smooth writer
*by J***Y on July 8, 2025*

Great pen. I love the large tank and it is a smooth writer. I never have any trouble getting the ink to flow even if it ends up sitting for a week or two.

### ⭐⭐⭐⭐⭐ Daily Writer Superstar
*by K***R on February 2, 2023*

One of the best fountain pens I have found as a daily writer. I have always carry a fountain pen as my daily pen because I have to document my activities in great detail. Of course, like most of us I run out of ink at the most inappropriate times. But now, I no longer have to stick cartridges in my truck, wife's car, my carry bag, my work desk, coat pockets, or other places around my work and home to ensure I have a ink cartridge ready when I need one. This pen holds a tremendous amount of ink with the ink level clearly shown since the barrel is clear. I ordered my ECO with a fine nib which seems to lean more towards a medium. A smooth writer on a variety of paper forms I complete each day. If you are looking for a workhorse pen you can use everyday I would recommend you give the ECO a try, I think its the best and most cost effective pen around if you write a lot during the day.

### ⭐⭐⭐⭐⭐ Amazing Pen
*by K***E on February 19, 2025*

This is an extremely solid fountain pen for the price. It is easy to load up a lot of ink and writes very smoothly. The cap stays on nicely since it is a twist on and posts on the back of the pen as well.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sk/products/79718172-twsbi-eco-transparent-blue-fountain-pen-f-nib](https://www.desertcart.sk/products/79718172-twsbi-eco-transparent-blue-fountain-pen-f-nib)

---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-06*