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Featuring innovative eyedropper filling systems

The Opus 88 Koloro Blue Fountain Pen features a semi-translucent barrel in deep blue hues, allowing a glimpse of the ink inside. Its polished ebonite cap adds a touch of elegance, creating a striking contrast that enhances the pen's modern aesthetic. This pen uses a Japanese-style eyedropper filling system, where you manually fill the barrel with the included eyedropper or syringe. A built-in valve lets you control ink flow and prevent leaks, so you can carry it with confidence. Simply twist open the valve for longer writing sessions and close it again when done. It's the perfect choice for fountain pen lovers who appreciate unique design and practical innovation.
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.
Please return any unwanted items within 21 days of purchase. 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
Founded in 1988 by Michael Hsu, Opus 88 crafts precision fountain pens that blend form and function
Featuring innovative eyedropper filling systems