--- product_id: 48933251 title: "Diamond 580, Dispenser, Piston Fountain Pen, Nib F Fountain Pen, Demonstrator Clear" brand: "twsbi" price: "€ 150.94" currency: EUR in_stock: true reviews_count: 13 category: "Twsbi" url: https://www.desertcart.hr/products/48933251-diamond-580-dispenser-piston-fountain-pen-nib-f-fountain-pen store_origin: HR region: Croatia --- # Clear demonstrator body for visible ink flow Detachable nib & piston for easy maintenance 1.9cc piston ink capacity Diamond 580, Dispenser, Piston Fountain Pen, Nib F Fountain Pen, Demonstrator Clear **Brand:** twsbi **Price:** € 150.94 **Availability:** ✅ In Stock ## Summary > 🖋️ Elevate your writing game with the pen that’s as transparent about quality as you are. ## Quick Answers - **What is this?** Diamond 580, Dispenser, Piston Fountain Pen, Nib F Fountain Pen, Demonstrator Clear by twsbi - **How much does it cost?** € 150.94 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/48933251-diamond-580-dispenser-piston-fountain-pen-nib-f-fountain-pen) ## 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 - • **Effortless Ink Mastery:** Piston filling system holds a generous 1.9cc ink reservoir—write longer, refill less. - • **Transparent Innovation:** Demonstrator clear acrylic body lets you watch your ink level in real-time—never run dry unexpectedly. - • **Sleek Minimalist Design:** Lightweight 50g aluminum & stainless steel build with a modern button closure, blending style with function. - • **Built to Last & Customize:** Includes silicone grease and wrench for smooth piston maintenance and nib removal—engineered for longevity. - • **Precision at Your Fingertips:** Fine (F) nib delivers crisp, consistent lines perfect for professional note-taking and sketching. ## Overview The TWSBI Diamond 580 is a premium piston-filling fountain pen featuring a 1.9cc ink capacity and a fine nib for precise writing. Its clear demonstrator acrylic body offers a modern aesthetic and practical ink visibility. Designed for durability and easy maintenance, it includes tools and silicone grease for piston lubrication and nib cleaning. Ideal for professionals and creatives seeking a reliable, stylish writing instrument that combines functionality with minimalist elegance. ## Description The new 580 model is an improved version of the Diamond 540, with a piston fill mechanism and 1.9cc ink capacity. Available as a Clear Demostrator, with a choice of nib widths. Comes with a smart, modern clear box and a little vial of silicone grease to lubricate the piston over time. There is an instruction sheet and small spanner to take the piston mechanism from the barrel to allow the lubricating. The nib, ink feed and grip section can also be taken apart for cleaning and maintenence - it is not advised unless necessary, but it can be done. Best advice is to enjoy the great design, writing experience and value! Don't forget that if you are from the UK or EU, when you buy a pen from outside the EU, like the USA, there are added charges when the pen arrives at customs in the UK. Review: Worth the bit extra - Lovely pen; nice to hold, responsive and with good flow of ink. It came well packaged and in its own case. Not only is It perfect to write with, but it is also my first choice pen for sketching with. It may seem a bit more expensive than others but, if you like using a fountain pen, it is worth checking out Review: Happy so far - A beautiful writing and sketching implement, nice in the hand, perfect weight for me with easy ink filling and zero smudging. As far as longevity goes I would have to give an updated review in 6 months or so as I've only had the beautiful pen for approx 5 weeks. ## Features - Push button dosing, piston, Demonstrator Fountain Pen - F nib - Model Diamond Clear 580 - & # x202 °F; Material: Acrylic, Stainless Steel ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00BT1BLRU | | Age Range Description | Adult | | Age range (description) | Adult | | Best Sellers Rank | 117,579 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 555 in Fountain Pens | | Body Shape | Cylindrical | | Brand | TWSBI | | Brand Name | TWSBI | | Closure Type | Button | | Colour | Clear | | Customer Reviews | 4.6 out of 5 stars 350 Reviews | | Drill Point | Fine | | Global Trade Identification Number | 04711467443120 | | Grip Type | Cylindrical | | Hardness | F | | Included Components | wrench, silicone grease | | Ink Base | Water | | Ink Colour | Black | | Ink colour | Black | | Is the Product Left or Right Handed? | Ambidextrous | | Item Diameter | 14 Millimetres | | Item Dimensions | 19.1 x 6.1 x 3 centimetres | | Item Weight | 50 Grams | | Line Size | 0.3mm | | Manufacturer | TWSBI | | Material | Aluminum Stainless Steel | | Material Type | Aluminum Stainless Steel | | Model Name | TWSBI Diamond 580 | | Model Number | M7443120 | | Recommended Uses For Product | everyday writing, note-taking, journaling, calligraphy, art projects | | Special Features | Taschen Clip | | Style | Minimalist | | Subject Character | TWSBI | | Theme | Writing & Journaling | | Unit Count | 1 count | | Water Resistance Level | Not Water Resistant | | Writing Instrument Form | Fountain Pen | | Writing Technique | fountain pen | | Writing instrument form | Fountain Pen | ## Product Details - **Age range (description):** Adult - **Brand:** TWSBI - **Colour:** Clear - **Ink colour:** Black - **Material:** Aluminum Stainless Steel - **Model name:** TWSBI Diamond 580 - **Point type:** Fine - **Special feature:** Taschen Clip - **Unit count:** 1 Count - **Writing instrument form:** Fountain Pen ## Images ![Diamond 580, Dispenser, Piston Fountain Pen, Nib F Fountain Pen, Demonstrator Clear - Image 1](https://m.media-amazon.com/images/I/51uLmeKB4tL.jpg) ## Questions & Answers **Q: Not enough room for two questions.. Do these pens tend to leak? Mine has, some.** A: I have 5 of them. One was leaking so where the nib section connects to the barrel. Of course, I overtightened and it broke. The nib section was still screwed into the pen which I could not remove as I do not have the correct tools. I emailed TWIB and was told it was my problem and to order a new pen or parts. Thus, I quit buying from this company. I realize it was my fault and was hoping I could have sent the pen to them to fix. The customer service is terrible. **Q: Can this pen be filled with an eye Dropper?** A: Not with an eye dropper, but you can unscrew the grip section of the pen and use a fountain pen syringe to fill the ink barrel from the top. **Q: What’s the main difference compared to twsbi eco?** A: Price. Apart from that the main difference is appearance. The 580 is a traditional-looking pen and I love them. The Eco is more modern looking. The writing experience is very similar. I believe they use the same nibs and ink-feed mechanism. They are both great - it is a matter of style / personal preference. **Q: Received my twsbi 580 yesterday. i notice that the nib seems to spin in it's holder-thing. is this normal?** A: Mine does not spin. Could be something in yours is not screwed firmly into place. (There's a way to take it apart and even swap nibs, but I've never done that.) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worth the bit extra *by D***D on 20 May 2026* Lovely pen; nice to hold, responsive and with good flow of ink. It came well packaged and in its own case. Not only is It perfect to write with, but it is also my first choice pen for sketching with. It may seem a bit more expensive than others but, if you like using a fountain pen, it is worth checking out ### ⭐⭐⭐⭐⭐ Happy so far *by R***F on 28 March 2026* A beautiful writing and sketching implement, nice in the hand, perfect weight for me with easy ink filling and zero smudging. As far as longevity goes I would have to give an updated review in 6 months or so as I've only had the beautiful pen for approx 5 weeks. ### ⭐⭐⭐⭐⭐ I love this pen *by A***I on 30 December 2024* I have been using this pen for a year now and it has still not let me down once. ## Frequently Bought Together - TWSBI Diamond 580 Fountain Pen nib F - Twsbi Diamond 50 Ink Bottle (Polished Aluminum) --- ## 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.hr/products/48933251-diamond-580-dispenser-piston-fountain-pen-nib-f-fountain-pen](https://www.desertcart.hr/products/48933251-diamond-580-dispenser-piston-fountain-pen-nib-f-fountain-pen) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-08*