---
product_id: 176958300
title: "Converter"
brand: "online"
price: "€ 17.29"
currency: EUR
in_stock: true
reviews_count: 13
category: "Online"
url: https://www.desertcart.de/products/176958300-converter
store_origin: DE
region: Germany
---

# Holds volume of 2 standard cartridges Refillable, eco-friendly ink solution Fits standard fountain & rollerball pens Converter

**Brand:** online
**Price:** € 17.29
**Availability:** ✅ In Stock

## Summary

> ♻️ Write smarter, save greener — upgrade your pen game today!

## Quick Answers

- **What is this?** Converter by online
- **How much does it cost?** € 17.29 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/176958300-converter)

## Best For

- online enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Practical:** Standard size (70x8x8mm) fits perfectly, blending invisibly into your pen’s barrel.
- • **Crystal Clear Design:** Transparent synthetic body lets you monitor ink levels with sleek, durable style.
- • **Precision Engineering:** German-made quality ensures smooth, reliable ink flow without leaks or air pockets.
- • **Eco-Conscious Refilling:** Cut costs and plastic waste by refilling with bottled ink instead of disposable cartridges.
- • **Universal Compatibility:** Seamlessly fits most standard fountain and rollerball pens for effortless upgrades.

## Overview

The ONLINE standard ink converter is a premium, refillable cartridge alternative designed for fountain and rollerball pens. Crafted from durable synthetic material with a crystal-clear design, it holds the equivalent of two standard ink cartridges. Compatible with major brands, this German-engineered converter offers a cost-effective, eco-friendly solution that enhances your writing experience while reducing plastic waste.

## Description

From the manufacturer Converter for standard fountain pens Fans and lovers of high-quality writing have long been fascinated in writing with bottled ink. That´s why they celebrate filling the converter with ink. If you don't have a piston filler, simply use the practical converter in your standard fountain pen. This can easily be refilled with ink from the inkwell. Also suitable for following brands ONLINE Pelikan Schneider Faber Castell Kaweco Stabilo Online Schreibgeräte ONLINE – a trendsetter in design and style – leads you into the fascinating world of pens and let you feel the pure joy of writing. With enthusiasm and passion, ONLINE develops high-quality products characterised by innovation, functionality and an eye for design. The family-run business demands the highest standards of quality and service, with a production focus on high levels of technical know-how, a motivated team and modern logistics.

Review: They don't fit Parker pens - I am sure these are great but they don't fit Parker fountain pens!
Review: Reliable ink converter that eliminates disposable cartridge waste and reduces writing costs - I got this ink converter after growing tired of constantly purchasing new disposable cartridges for my fountain pen. The refillable design allows using bottled ink indefinitely, which has already proved significantly more economical than relying on expensive cartridge replacements. The synthetic material construction feels sufficiently durable for repeated filling cycles without showing signs of cracking or degradation. The converter mechanism works smoothly, drawing ink reliably from bottles without air pockets or incomplete fills that would interrupt writing flow. The universal compatibility works perfectly with my standard fountain pen, fitting securely into the barrel without wobbling or feeling loose. The fit feels intentional and well-engineered rather than a generic approximation that might cause leaking or connection issues. The black colour is discreet and practical, blending invisibly within the pen barrel without aesthetic concerns. I barely notice it's there during regular writing, which is exactly what you want from functional equipment rather than something demanding visual attention. The refillable aspect has genuinely simplified my writing routine. Rather than hunting for specific cartridge types and managing inventory, I simply keep a bottle of ink available and refill as needed. This flexibility has proved genuinely convenient for someone who writes regularly throughout work days. The ink capacity remains consistent across multiple fill cycles without degradation or reduced holding capacity. After weeks of regular refilling and use, the converter performs identically to initial use without any apparent wear or diminished functionality. The environmental benefit of eliminating disposable cartridges appeals to my preference for sustainable alternatives. The reduction in plastic waste from single-use cartridges represents a meaningful contribution to reducing household environmental impact. Overall, this ink converter delivers genuine practical and economic benefits for fountain pen users wanting to move away from disposable cartridges. The reliable functionality combined with durable construction makes it ideal for regular writers seeking economical alternatives. A worthwhile investment that's simplified my writing setup whilst reducing ongoing costs considerably.

## Features

- quality: Premium ink converter for standard fountain pen and rollerball systems. If your pen accepts standard ink cartriges, the ONLINE converter will fit perfectly.
- VOLUME: The converter has a filling volume of two standard ink cartriges. Save money, avoid rubbish, and protect the environment by refilling your ink pen using bottled ink.
- CLEAN DESIGN: The converter is made of plastic in crystal clear design. Thanks to the sturdy frame, this converter is made for multiple use.
- STANDARD SIZE: Dimensions: 70 x 8 x 8 mm - universal size for standard fountain pens!
- ONLINE BRAND QUALITY: ONLINE is a German company founded in 1991 and specialises in pens, calligraphy kits, pen cases and much more. ONLINE offers quality only!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00UR5HN6C |
| Best Sellers Rank | 13,396 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 39 in Fountain Pens |
| Brand | Online |
| Brand Name | Online |
| Country Of Origin | Germany |
| Customer Reviews | 4.0 out of 5 stars 1,606 Reviews |
| Global Trade Identification Number | 04014421401380 |
| Included Components | ink_cartridge |
| Ink Colour | black |
| Item Dimensions | 7.6 x 0.8 x 0.8 centimetres |
| Item Type Name | Plastic converter. |
| Item Weight | 5 Grams |
| Item dimensions L x W x H | 7.6 x 0.8 x 0.8 centimetres |
| Item weight | 5 Grams |
| Manufacturer | Online |
| Manufacturer Part Number | 40138 |
| Model Number | 40138 |
| Number of Pieces | 1 |
| Number of pieces | 1 |
| Package Size Name | Single |
| Point Type | standard |
| Point type | standard |
| Product Warranty | 2 Year |
| Style | Fountain |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Online
- **Item dimensions L x W x H:** 7 x 0.8 x 0.8 centimetres
- **Item weight:** 5 g
- **Number of pieces:** 1
- **Style:** Fountain

## Images

![Converter - Image 1](https://m.media-amazon.com/images/I/712OiNUMRHL.jpg)

## Questions & Answers

**Q: Does it fit a Laban fountain pen?**
A: If the Laban takes normal Euro cartridges then yes the nozzle will be the same_depends how long the barrel is as to whether it can be screwed shut from far end.

**Q: Does this fit a Hugo boss fountain pen**
A: I bought this to fit my Parker pen but did not fit. This product is well made and is of very high quality even better then the Parker converter. Luckily it fits well to another of my pen. I don’t own any Hugo pen so if it accepts Parker converter then look for something else.

**Q: Will this converter fit a cross atx fountain pen?**
A: I don't know a cross atx fountain pen but if it takes standard cartridges it should work.
I bought three and they all work well.

**Q: Has anyone tried this specific converter in a rotring art pen? i tried the lamy z28 but the barrel did not close since it gets thin towards the end.**
A: It should be OK in a Rotring as the Art Pen has a longer capacity barrel above the nib unit
Lamy's doesn't fit as the ink cartridge nozzle is different size. The Online one is compatible with standard euro ink cartridges which is the same as Rotring. Hope that helps.

## Customer Reviews

### ⭐⭐⭐⭐⭐ They don't fit Parker pens
*by M***C on 14 May 2026*

I am sure these are great but they don't fit Parker fountain pens!

### ⭐⭐⭐⭐⭐ Reliable ink converter that eliminates disposable cartridge waste and reduces writing costs
*by R***R on 27 May 2026*

I got this ink converter after growing tired of constantly purchasing new disposable cartridges for my fountain pen. The refillable design allows using bottled ink indefinitely, which has already proved significantly more economical than relying on expensive cartridge replacements. The synthetic material construction feels sufficiently durable for repeated filling cycles without showing signs of cracking or degradation. The converter mechanism works smoothly, drawing ink reliably from bottles without air pockets or incomplete fills that would interrupt writing flow. The universal compatibility works perfectly with my standard fountain pen, fitting securely into the barrel without wobbling or feeling loose. The fit feels intentional and well-engineered rather than a generic approximation that might cause leaking or connection issues. The black colour is discreet and practical, blending invisibly within the pen barrel without aesthetic concerns. I barely notice it's there during regular writing, which is exactly what you want from functional equipment rather than something demanding visual attention. The refillable aspect has genuinely simplified my writing routine. Rather than hunting for specific cartridge types and managing inventory, I simply keep a bottle of ink available and refill as needed. This flexibility has proved genuinely convenient for someone who writes regularly throughout work days. The ink capacity remains consistent across multiple fill cycles without degradation or reduced holding capacity. After weeks of regular refilling and use, the converter performs identically to initial use without any apparent wear or diminished functionality. The environmental benefit of eliminating disposable cartridges appeals to my preference for sustainable alternatives. The reduction in plastic waste from single-use cartridges represents a meaningful contribution to reducing household environmental impact. Overall, this ink converter delivers genuine practical and economic benefits for fountain pen users wanting to move away from disposable cartridges. The reliable functionality combined with durable construction makes it ideal for regular writers seeking economical alternatives. A worthwhile investment that's simplified my writing setup whilst reducing ongoing costs considerably.

### ⭐⭐⭐⭐ Not exactly as advertised
*by T***V on 15 January 2022*

This adaptor certainly is not universal. It did not fit the pens I wanted but I was able to use them on others. Difficult to find out until you have them.

## Frequently Bought Together

- Online Schreibgerate ONLINE standard ink converter │ cartridge converter made of synthetic material │ fits standard fountain pens and rollerball pens │ refillable,Black
- Parker Fountain Pen Ink Bottle | Black QUINK Ink | 57 ml Fountain Pen Refill
- Asvine 5 Pack Fountain Pen Ink Syringe Filler, Spring Converter with Removable Blunt Needle Tip

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**Shop now:** [https://www.desertcart.de/products/176958300-converter](https://www.desertcart.de/products/176958300-converter)

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-06-21*