---
product_id: 1406818
title: "TWSBI Diamond 580 Fountain Pen nib EF"
brand: "twsbi"
price: "424.37 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Twsbi"
url: https://www.desertcart.tn/products/1406818-twsbi-diamond-580-fountain-pen-nib-ef
store_origin: TN
region: Tunisia
---

# TWSBI Diamond 580 Fountain Pen nib EF

**Brand:** twsbi
**Price:** 424.37 DT
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** TWSBI Diamond 580 Fountain Pen nib EF by twsbi
- **How much does it cost?** 424.37 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/1406818-twsbi-diamond-580-fountain-pen-nib-ef)

## Best For

- twsbi enthusiasts

## Why This Product

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

## Description

desertcart.com : TWSBI Diamond 580 Fountain Pen nib EF : Office Products

Review: Great pen at a good price - TWSBI 580 is a large sturdy pen made of clear strong plastic, trimmed with chrome, capped it is 5.6" long and weighs 28.5 grams. When uncapped it is 5.1" long and weighs 14.4 grams; its round faceted barrel diameter is 0.5". It can only be filled with a piston and does not accept ink cartridges. Posting the pen is awkward and inconvenient; the total 7.1" length and the 14.1 grams weight of the posted cap result in an imbalance. The packaging is very good. Inside a cardboard box with a red TWSBI logo is a clear demonstrator plastic box wrapped with protective foam padding. The box includes the pen, silicone grease and a TWSBI wrench to facilitate servicing the pen. The box is a keeper. Out of the box the nib did not require any adjusting or rinsing. After inking up the pen, the writing was smooth without any skipping. The nib was evenly wet with constant ink flow with minimal pressure and slid easily on the paper. Pros Large capacity piston filler. Clear strong plastic body. Easy ink flow through nib. Easily replaceable and interchangeable nibs. Ease of cleaning and maintenance. Cons Hardly any. But if I had to nit-pick it would be: * Relatively large size of the pen (for individuals with small hands) * Pen does not post well - feels off balance when posted. * Does not accept ink cartridges. The TWSBI Diamond 580 is a very good all around pen for everyday writing as well as calligraphy, thanks to its effortlessly interchangeable nibs from EF, F, M, B and stub 1.1 or 1.5 mm for script/scrawl. It is easily comparable to the major brands at a fraction of the price, which makes it a great value.
Review: The best pen for around $50 - Coming from nearly any pen, this thing is amazing. It writes so smoothly and the piston filling system makes it almost as easy to fill as any cartridge pen. I used to use a Pilot Metropolitan which is a great pen but I can't go back now. This pen feels great to write with and one fill of ink (I use noodlers bulletproof black) will last you well over a week even with the most excessive and wasteful doodling. I have shown this to many of my friends who like to use good pens and they all think it's amazing. Additionally, I got the Extra Fine nib size and I never have a problem with bleeding or smearing, even on cheap lined paper or textbooks where the paper is coated. Amazing pen 10/10 would recommend.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00C5LI7HA |
| Additional Features | Detachable |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #112,611 in Office Products ( See Top 100 in Office Products ) #446 in Fountain Pens |
| Body Shape | Round |
| Brand | TWSBI |
| Brand Name | TWSBI |
| Closure Type | Snap |
| Color | Demonstrator, Clear |
| Customer Reviews | 4.6 out of 5 stars 222 Reviews |
| Drill Point | Extra Fine |
| Grip Type | smooth |
| Hand Orientation | Ambidextrous |
| Hardness | F |
| Included Components | Storage Case |
| Ink Base | Water |
| Ink Color | Black |
| Item Diameter | 13.3 Millimeters |
| Item Weight | 0.11 Pounds |
| Line Size | 0_3mm |
| Manufacturer | TWSBI |
| Material | Plastic |
| Material Type | Plastic |
| Model Number | M7443110 |
| Recommended Uses For Product | Writing |
| Unit Count | 1.0 Count |
| Writing Instrument Form | Fountain Pen |
| Writing Technique | fountain pen |

## Product Details

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

## Images

![TWSBI Diamond 580 Fountain Pen nib EF - Image 1](https://m.media-amazon.com/images/I/31Lqfv8CZEL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great pen at a good price
*by S***Y on June 1, 2013*

TWSBI 580 is a large sturdy pen made of clear strong plastic, trimmed with chrome, capped it is 5.6" long and weighs 28.5 grams. When uncapped it is 5.1" long and weighs 14.4 grams; its round faceted barrel diameter is 0.5". It can only be filled with a piston and does not accept ink cartridges. Posting the pen is awkward and inconvenient; the total 7.1" length and the 14.1 grams weight of the posted cap result in an imbalance. The packaging is very good. Inside a cardboard box with a red TWSBI logo is a clear demonstrator plastic box wrapped with protective foam padding. The box includes the pen, silicone grease and a TWSBI wrench to facilitate servicing the pen. The box is a keeper. Out of the box the nib did not require any adjusting or rinsing. After inking up the pen, the writing was smooth without any skipping. The nib was evenly wet with constant ink flow with minimal pressure and slid easily on the paper. Pros Large capacity piston filler. Clear strong plastic body. Easy ink flow through nib. Easily replaceable and interchangeable nibs. Ease of cleaning and maintenance. Cons Hardly any. But if I had to nit-pick it would be: * Relatively large size of the pen (for individuals with small hands) * Pen does not post well - feels off balance when posted. * Does not accept ink cartridges. The TWSBI Diamond 580 is a very good all around pen for everyday writing as well as calligraphy, thanks to its effortlessly interchangeable nibs from EF, F, M, B and stub 1.1 or 1.5 mm for script/scrawl. It is easily comparable to the major brands at a fraction of the price, which makes it a great value.

### ⭐⭐⭐⭐⭐ The best pen for around $50
*by D***E on May 5, 2016*

Coming from nearly any pen, this thing is amazing. It writes so smoothly and the piston filling system makes it almost as easy to fill as any cartridge pen. I used to use a Pilot Metropolitan which is a great pen but I can't go back now. This pen feels great to write with and one fill of ink (I use noodlers bulletproof black) will last you well over a week even with the most excessive and wasteful doodling. I have shown this to many of my friends who like to use good pens and they all think it's amazing. Additionally, I got the Extra Fine nib size and I never have a problem with bleeding or smearing, even on cheap lined paper or textbooks where the paper is coated. Amazing pen 10/10 would recommend.

### ⭐⭐⭐⭐⭐ Nice pen, excellent customer service
*by S***T on June 23, 2016*

This pen had been on my wish list for ages and I finally ordered it. It's a bit pricey for a non-flex nib pen but I decided to just go ahead and do it. I ordered the EF nib, when it arrived, it came with the F nib. I emailed TWSBI and within 10 minutes I not only had a reply but a resolution! I was sent the EF tip right away. It was a snap to swap out. The prompt customer service by Philip was awesome and I've never had such a fast resolution before. The pen itself is very pretty, I like the transparent barrel and being able to see what color ink and how much I have left. Writing with the EF nib is nice, although I do wish the nib had a little bit of flex. All in all I'm very happy so far with the pen. Do be aware though when writing don't put the cap on the end.

## Frequently Bought Together

- TWSBI Diamond 580 Fountain Pen nib EF
- TWSBI 70ml Fountain Pen Ink, Black
- Twsbi Diamond 50 Ink Bottle (Polished Aluminum)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-17*