TWSBI Diamond 580 Fountain Pen Expand

TWSBI Diamond 580 Clear Fountain Pen



  • Piston filling mechanism
  • Large ink capacity
  • Wide range of nib choices
  • User serviceable
  • German made nib

More details

Availability: 7-10 days

£ 46.98

More info

The upgraded replacement for the Diamond 540. Same size, same features but improved in many areas. Both front sections and barrel now feature trim rings for reinforcement. Also, the metal threaded part that held the piston mechanism has been deleted with the result that the barrel material is thicker and therefore stronger in this region. The TWSBI Diamond 580 features the same piston mechanism and huge 1.9cc ink capacity - the largest of any pen in this price range.

This pen only uses bottled ink, check out our huge collection of fountain pen inks.

The Diamond 580 is virtually unique amongst fountain pens in that it can be completely disassembled by the user for cleaning and servicing and experienced users are encouraged to do so. Full servicing instructions are included with the pen as well as a small wrench to remove the piston mechanism and a bottle of silicone lubricant for the piston mechanism.  See download tab for printable instruction PDF.

See our reference section for more details on TWSBI nibs.


TWSBI 580 Instruction manual

Instructions on the use and care of your pen

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TWSBI Diamond 580 Clear Fountain Pen

TWSBI Diamond 580 Clear Fountain Pen



Length Capped = 142 mm

Nib length = 18.2 mm

Section length = 21 mm

Section diameter (max/min) = 10.0/9.3 mm

Barrel diameter (max) = 13.1 mm

Total length (not posted, including nib) = 129.2 mm

Total length posted (including nib) = 175.2 mm

Weight = 29 g

Shipping cost and availability

Shipping cost
UK postage is FREE over £35 but otherwise starts at £1.80 for small items (converters, refills etc) or £3.30 for ink, stationery etc.

Overseas shipping starts at only £4.00. The exact cost varies by price, weight and delivery country so to find out your final shipping cost just add the item to your shopping basket and select the delivery country. You don't have to enter any personal details - just an e-mail address but this isn't stored unless you create an account. We offer a choice of shipping services from Royal Mail and DHL.

VAT (at 20%) is automatically taken off for destinations outside the UK. Note that if you are ordering within the EU you will have to pay VAT when your parcel arrives.

If an item is in stock, the words "In stock" will be shown. If an item is out of stock, the approximate number of days before we get another delivery will be shown instead. You may still be able to order the item, but there will be a delay before we can dispatch your item(s). If the words "Please enquire" are shown, it's best to check with us first before ordering.

Nib choices for fountain pens
If we show the pen with the default nib selection shown in stock it means we have stock of that pen. If you select another nib size and the website doesn't say "in stock" we can usually supply that pen immediately as we keep extensive supplies of nibs from all our manufacturers.