--- product_id: 1477520 title: "TWSBI Diamond 580/540 Nib Set B" brand: "twsbi" price: "$0.51" currency: USD in_stock: false reviews_count: 8 url: https://www.desertcart.us/products/1477520-twsbi-diamond-580-540-nib-set-b store_origin: US region: United States of America --- # Multiple Sizes Available Free Shipping Replaceable Nib Set TWSBI Diamond 580/540 Nib Set B **Brand:** twsbi **Price:** $0.51 **Availability:** ❌ Out of Stock ## Summary > πŸ–ŠοΈ Write Your Legacy with Style! ## Quick Answers - **What is this?** TWSBI Diamond 580/540 Nib Set B by twsbi - **How much does it cost?** $0.51 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/1477520-twsbi-diamond-580-540-nib-set-b) ## 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 - β€’ **Seamless Replacement:** Effortlessly swap nibs to match your mood or project. - β€’ **Versatile Nib Options:** Choose from B, M, F, EF, Stub1.1, and Stub1.5 for every writing style. - β€’ **Crafted for Perfection:** Engineered for smooth ink flow and consistent performance. - β€’ **Elevate Your Writing Experience:** Transform your TWSBI Diamond 580/540/530 with precision nibs. - β€’ **Join the Fountain Pen Revolution:** Experience the luxury of customizable writing. ## Overview The TWSBIDiamond 580/540 Nib Set B offers a range of replaceable nibs for TWSBI Diamond fountain pens, including sizes B, M, F, EF, Stub1.1, and Stub1.5, ensuring a personalized writing experience. Plus, enjoy the convenience of free shipping! ## Description Replaceable Nib Set for TWSBI 580, 540, 530 fountain pen. Comes in B, M, F, EF, Stub1.1, or Stub1.5 sizes Review: TWSBI is always reliable. No issues at all. Love the new nib option vs buying a new pen. - TWSBI is a favorite. I’m enjoying being able to swap out nib sizes without buying a whole new fountain pen. As always they work perfectly and I’ll continue building my collection. Great value, feels good in your hand, flow is great and I’ve never had a TWSBI leak or give me any trouble. I probably need to quit buying so many fountain pens but it’s so tempting. Review: Bought It for the Nib - Installed on My Precision - Precise - I bought this TWSBI assembly ( 580 ) because I need a smooth, broad line-scale. I installed the nib ( this 580 assembly is a B Broad ) alone on the assembly of my TWSBI Precision GunMetal Fountain. Once you learn that a few minutes in the freezer makes it easier to remove the TWSBI nibs ( Pressure/Friction Fit ) the swaps are easy. Again - the Nib ( Broad B ) from the TWSBI 580 can removed from the assembly and perfectly fit to the TWSBI Precision Fountain Pen assembly. YAY for Broad and Medium options. This swapped nib ( B ) makes my TWSBI Precision Gunmetal Fountain Pen - my formal / signature favorite. GREAT JOB - TWSBI !!! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00C5TKWJS | | Additional Features | Refillable | | Age Range (Description) | Adult | | Age Range Description | Adult | | Best Sellers Rank | #481,795 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #204 in Drawing Nibs | | Body Shape | Round | | Brand | TWSBI | | Brand Name | TWSBI | | Closure Type | Snap | | Color | Clear | | Customer Reviews | 4.7 out of 5 stars 28 Reviews | | Drill Point | EF, F, M, B, Stub | | Grip Type | Plastic | | Hand Orientation | Ambidextrous | | Hardness | F | | Included Components | Replaceable nib set for TWSBI 580, 540, 530 fountain pens in various sizes (B, M, F, EF, Stub1.1, or Stub1.5) | | Ink Base | Water | | Ink Color | Silver or Black | | Item Weight | 0.02 kg | | Line Size | Adjustable (depends on chosen nib size: EF, F, M, B, or Stub) | | Manufacturer | TWSBI | | Material | Alloy Steel , Plastic | | Material Type | Alloy Steel, Plastic | | Model Number | M7443590 | | Recommended Uses For Product | Writing | | Style | B | | Theme | traditional writing | | Unit Count | 1 Count | | Water Resistance Level | Not Water Resistant | | Writing Instrument Form | Fountain Pen | | Writing Technique | fountain pen | ## Product Details - **Age Range (Description):** Adult - **Brand:** TWSBI - **Color:** Clear - **Ink Color:** Silver or Black - **Writing Instrument Form:** Fountain Pen ## Images ![TWSBI Diamond 580/540 Nib Set B - Image 1](https://m.media-amazon.com/images/I/514Ll0-v3iL.jpg) ![TWSBI Diamond 580/540 Nib Set B - Image 2](https://m.media-amazon.com/images/I/619Kz6m6svL.jpg) ![TWSBI Diamond 580/540 Nib Set B - Image 3](https://m.media-amazon.com/images/I/51HI9gP9cCL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ TWSBI is always reliable. No issues at all. Love the new nib option vs buying a new pen. *by A***I on June 19, 2025* TWSBI is a favorite. I’m enjoying being able to swap out nib sizes without buying a whole new fountain pen. As always they work perfectly and I’ll continue building my collection. Great value, feels good in your hand, flow is great and I’ve never had a TWSBI leak or give me any trouble. I probably need to quit buying so many fountain pens but it’s so tempting. ### ⭐⭐⭐⭐⭐ Bought It for the Nib - Installed on My Precision - Precise *by J***G on July 11, 2024* I bought this TWSBI assembly ( 580 ) because I need a smooth, broad line-scale. I installed the nib ( this 580 assembly is a B Broad ) alone on the assembly of my TWSBI Precision GunMetal Fountain. Once you learn that a few minutes in the freezer makes it easier to remove the TWSBI nibs ( Pressure/Friction Fit ) the swaps are easy. Again - the Nib ( Broad B ) from the TWSBI 580 can removed from the assembly and perfectly fit to the TWSBI Precision Fountain Pen assembly. YAY for Broad and Medium options. This swapped nib ( B ) makes my TWSBI Precision Gunmetal Fountain Pen - my formal / signature favorite. GREAT JOB - TWSBI !!! ### ⭐⭐⭐⭐⭐ The best nib for a TWSBI. *by T***G on March 11, 2018* I bought a TWSBI 580AL a while ago and it was a very frustrating pen with a slow ink starvation problem. Early on it would start skipping after a page or two. After some nib adjustments could get this issue out to 3-4 pages of writing, but I always knew that particular Medium nib was just not right. Throughout my trying to fix the issue I read and watched many TWSBI reviews. I came to the conclusion the TWSBI Broad nib consistently was the most trouble free, not to mention the feel of it on paper also had great acclaim. This is why I bought this nib... to replace my troubled Medium nib. I'm happy to report this nib works fantastic. It is exceptional. I've written many pages with no issue. It is nice and juicy, I can see ink shading in my words and it is sooo smooth. I will mention there definately is a sweet spot on my nib, when I'm in that zone it clearly lays down the ink the best. As a steel nib, there is no flex nor softness, which I'm good with. This nib has restored my faith in TWSBI. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/1477520-twsbi-diamond-580-540-nib-set-b](https://www.desertcart.us/products/1477520-twsbi-diamond-580-540-nib-set-b) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-14*