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SKU
C-M7445520
TWSBI ECO Cosmos Blue with Onyx Fountain Pen
£50.00
In stock
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.
Nib size guide
- Smooth steady ink flow
- Distinct line variances
- EF particularly fine
Drawing inspiration from the quiet depth of the night sky, the ECO Cosmos Blue with Onyx edition captures the serene beauty of a starlit horizon. Its cap and piston knob are crafted from rich, deep blue resin, subtly marbled to evoke swirling cosmic clouds contrasted by sleek onyx-black accents that ground the design in modern sophistication. The transparent demonstrator barrel reveals the inner workings of TWSBI’s precise piston-fill system, offering both visual intrigue and practical insight into the ink level within.
Polished black hardware and the signature TWSBI red emblem on the finial complete the pen’s celestial aesthetic. The stainless steel nib, finished in matching black, delivers a smooth and consistent writing experience, with a balance of gentle feedback and dependable ink flow. Designed for extended writing sessions, the high-capacity piston-filling mechanism minimizes the need for frequent refills, while the screw-on cap with its secure O-ring seal protects against leaks and evaporation.
As with all ECO models, the Cosmos Blue with Onyx can be fully disassembled for cleaning and maintenance (tools included), though TWSBI recommends this only for experienced users.
Key Features
- Unique ‘Cosmos’ marbled cap with onyx trim
- Polycarbonate construction creates scratch resistant, resilient and crystal clear finish
- Hexagonal shaped cap and piston mechanism tip
- Twist action piston fill mechanism
- Stainless steel (in Bronze) 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 140mm x D 15mm
- Dimensions (Posted): L 168mm x D 15mm
- Diameter taken at widest point (not including clip)
- Weight: 21g
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.
Christmas Delivery Dates: Order by 3pm on following dates to receive your package in time; Dec 19th for Standard & Premium Tracked, Dec 23rd for Special/Next Day.
UK: We use a Royal Mail tracked service. Standard delivery is free over £30 (£2.50 charge for orders under £30) and takes 2 to 5 working days, Premium is £3.50 and takes 1 to 2 working days. Next working day is £6.95 and is delivered by 4pm (requires a signature).
International: We deliver worldwide with a standard and express service. Please visit our international website
Returns Information
Please return any unwanted items within 21 days of purchase to be eligible for an exchange/refund. 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.
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 info@penheaven.co.uk. If a faulty or incorrect item is returned, we will refund your postage up to the cost of 1st class recorded Royal Mail. If you are sending items from abroad, please call us for a delivery quote
Compatible Refills and Items
