Same Day Dispatch on Engraved Pens
Worldwide Delivery with Express Option
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Specialising in innovative in-built mechanisms for quicker, easier filling
SKU
C-M7446070
TWSBI Diamond 580 RBT Fountain Pen
£57.00
In stock
(26) 
Gift Wrap
We offer a professional giftwrap service to complement your pen or leather journal. Simply check the giftwrap option on the product page before you add to basket (a charge of £3.25 will be added).
We use a premium silver giftwrap paper with a subtle two-tone patterned effect, and a hand tied silver ribbon. We also include a matching gift tag, which can be appended with a message of your choice. Simply add your message to the text box when you reach your basket. Items are giftwrapped individually i.e. if you order several items only the specific item requested will be wrapped.
We do not include any paperwork inside the giftwrapped item. If you select a different delivery name to your billing details, we add a gift receipt which hides all prices.
Worldwide Delivery with DHL. Express options available
See All Delivery optionsNib size guide
- Smooth steady ink flow
- Distinct line variances
- EF particularly fine
The TWSBI Diamond 580 matches superior craftsmanship with distinctive design, creating a writing instrument every pen aficionado will covet. The striking diamond faceted barrel prevents your pen from rolling off the table, whilst the transparent construction allows you to see the piston fill workings and remaining ink levels. Sitting comfortably in the hand, this durable, lightweight fountain pen is finished with a screw-close cap and rubber O-ring to prevent leaks and drying. Match the Diamond 580 with the TWSBI Diamond Ink Bottle for an easy, fuss free filling experience.
All TWSBI fountain pens can be disassembled for cleaning and maintenance. TWSBI includes the tools to do so, but recommend this is only carried out by experienced fountain pen users. This should only be carried out as part of long term servicing of the pen; it will not need to be done straight away. All disassembly is carried out at the owners risk!
Key Features
- Transparent body with red cap and grip & blue mechanism twist tip
- Polycarbonate construction creates scratch resistant, resilient and crystal clear finish
- Diamond faceted barrel
- Twist action piston fill mechanism
- Stainless steel nib with intricate TWSBI logo and detailing
- Screw close cap
- Rubber O-ring prevents leakage and drying
- Gently tapered grip section
- TWSBI logo button on end cap
- TWSBI presentation box
- Lifetime manufacturer warranty
- Dimensions (Closed): L 120mm x D 13.5mm
- Dimensions (Posted): L 142mm x D 13.5mm
This is why people love it
Loads of good customer reviews submitted through feefo
Written on 09-Dec-2025
As always the TWSBI fountain pen is an excellent writing implement. I enjoy writing with a fountain pen. It was easy to log onto the pen heaven web site and order the pen.
Written on 16-Nov-2025
A very nice pen and not widely available in U.S. The main concern of mine was when first received there appeared to be ink on the nib so, without filling the pen I scribbled on paper and found that the pen must have been introduced to ink, already. I am assuming that the pen I received was used prior so I must have received a return that was not correctly purged of prior ink. I will not return the item but will not purchase from this company in the future
Written on 07-Jun-2025
Great pen and an amazing store. Shipping to the States was faster than the 5 or so stores I order from in the U.S.
Written on 23-May-2025
Great Service and fast shipping!!
Written on 22-Dec-2024
Written on 19-Sep-2024
Delivery Information
All orders placed before 3pm Mon-Fri are despatched the same day (except on a bank holiday), even if your order has personalisation. Orders placed after 3pm, at the weekend or on a bank holiday are despatched next working day.
We deliver worldwide with a choice of standard (tracked post) and express (DHL air) delivery for most countries. Standard delivery to European countries is €6.50 and takes approx. 2-5 working days, whilst express is €20 and takes 1-2 days. To USA we offer tracked post (6-10 days) for $6 (free on orders > $100), and an express service (2-5 days) for $12. Delivery charges and estimated times vary for rest of world countries, please see our delivery page for more information.
Returns Information
Please return any unwanted items within 21 days of purchase. Items purchased for Christmas can be returned up until Friday 23rd January. The item must still be in a re-saleable condition and returned with proof of purchase. Items that have been personalised cannot be returned unless they are faulty. Please email support@penheaven.com if you wish to return an item, and we can provide a returns label. The charge from Europe is €8 and £10 from most other major countries.
Should you receive a damaged or incorrectly dispatched item, please inform us within 7 days of receipt, so we can advise you on the return of the item. Call 0208 731 8610 or email support@penheaven.com. A returns label will be provided free of charge
TWSBI was named for the Chinese phrase “San Wen Tong” (Hall of Three Cultures). These initials were reversed (TWS) and "Bi" added (literally meaning writing instrument) to create the TWSBI name
Compatible Refills and Items
This is why people love it
Loads of good customer reviews submitted through feefo
- Written on 09-Dec-2025As always the TWSBI fountain pen is an excellent writing implement. I enjoy writing with a fountain pen. It was easy to log onto the pen heaven web site and order the pen.
- Written on 16-Nov-2025A very nice pen and not widely available in U.S. The main concern of mine was when first received there appeared to be ink on the nib so, without filling the pen I scribbled on paper and found that the pen must have been introduced to ink, already. I am assuming that the pen I received was used prior so I must have received a return that was not correctly purged of prior ink. I will not return the item but will not purchase from this company in the future
- Written on 07-Jun-2025Great pen and an amazing store. Shipping to the States was faster than the 5 or so stores I order from in the U.S.
- Written on 23-May-2025Great Service and fast shipping!!
- Written on 22-Dec-2024
- Written on 19-Sep-2024