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TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition

TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition

  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
  • TWSBI ECO Irish Green Onyx Fountain Pen - Fine - Limited Edition - TWSBI M7440730
$52.50
Temporarily out of stock. Click on "Get Restock Notification" on the right to be notified by email when this product is restocked.
(7)

Nib Color: Black

Accent Color: Dark Green

Body Color: Clear
DescriptionSpecificationsQuestions & Answers (5)
TWSBI fountain pens are loved for their high quality and affordability, offering advanced filling mechanisms normally reserved for much more expensive fountain pens. The TWSBI ECO (short for "economical") provides the same high-quality, high-capacity piston filler as the TWSBI Diamond 580 at an even lower price. It features a sleek, transparent barrel and a hexagonal screw-on cap that can be posted securely on the back of the pen. The piston filling mechanism is easily operated by twisting the knob at the end of the barrel counter-clockwise to extend the piston, submerging the nib in ink, then screwing the knob tight to retract the piston, drawing ink into the pen straight from the bottle. There's no need for cartridges or a converter! Be careful—operating the piston while ink is in the pen will cause ink to leak out of the pen.

This limited-edition pen features a deep green cap and piston knob, accented with a black nib and trim.

In keeping with their philosophy of promoting the traditional experience of using a fountain pen, TWSBI has designed this pen to be completely self-serviceable. It comes with a wrench and a vial of silicone grease you can use for at-home maintenance.

Notes:

  • Some TWSBI ECO Fountain Pens have nibs and feeds that are very difficult to remove. Attempting to remove the nib and feed forcefully may damage the feed.
  • This pen only uses bottled ink, which is not included with this pen. Check out our collection of bottled fountain pen inks here!
  • This pen may come with ink residue in the nib from being dip tested by TWSBI at the factory. As with all new fountain pens, JetPens recommends giving your TWSBI a good cleaning before you use it.

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Product Specifications

Model Number
TWSBI M7440730
TWSBI M7440730
Manufacturer
TWSBI
TWSBI
Accent Color
Dark Green
Dark Green
Body Color
Clear
Clear
Body Material
Plastic
Plastic
Capped or Retractable
Capped - Screw On
Capped - Screw On
Clip Material
Metal
Metal
Clippable
Yes
Yes
Converter Included
No
No
Diameter - Grip
10.0 mm
10.0 mm
Diameter - Max
15.2 mm
15.2 mm
Eyedropper Convertible i
No
No
Filling Mechanism
Piston
Piston
Fountain Pen Capacity i
1.5 ml
1.5 ml
Gift Set
No
No
Grip Color
Clear
Clear
Grip Material
Plastic
Plastic
Ink Refillable
Yes
Yes
Length - Capped
13.9 cm / 5.5 inches
13.9 cm / 5.5 inches
Length - Posted
16.8 cm / 6.6 inches
16.8 cm / 6.6 inches
Length - Uncapped
13.1 cm / 5.2 inches
13.1 cm / 5.2 inches
Nib Color
Black
Black
Nib Material
Steel
Steel
Nib Size
Fine
Fine
Tip Replaceable
No
No
Tip Type
Nib
Nib
Weight - Barrel (Empty)
0.31 oz / 9 grams
0.31 oz / 9 grams
Weight - Cap
0.43 oz / 12 grams
0.43 oz / 12 grams
Weight - Whole Pen (Empty)
0.75 oz / 21 grams
0.75 oz / 21 grams

Customer Reviews

This is my second TWISBI...
September 30, 2024
Verified Purchase
This is my second TWISBI ECO, and like my first one it writes smoothly and needs no extra work to get the ink flowing right away on the paper (even if its been sitting unused for a while) The built-in piston-filling mechanism holds a large amount of ink so I rarely need to refill it in comparison to some other pens I use. The black nib and trim are very neat, appearing more matte than my steel nibs.

In regards to the Fine tip, it seems to write a little thicker than my Pilot Metropolitan F, similar width to my Platinum Preppy F. In general I think it also writes a bit more 'wet'. So far, I've really enjoyed using it for illustration and the Sailor Shikiori Tokiwa-Matsu Ink ink I'm using in it as well.
2 people found this helpful
Kimsim17305
I have many TWSBI ECO...
October 2, 2024
Verified Purchase
I have many TWSBI ECO and really didn't need another one but I just love this beautiful green pen and glad I purchased it--especially from Jet Pens. It's one of my best writers and your shipping rate (low end to get it free) is much appreciated.
1 person found this helpful
cottagelily
This is an amazingly...
September 18, 2024
Verified Purchase
This is an amazingly smooth nib! I am new to fountain pens but I have sampled a good variety of pens already and I still really love it in comparison to the others. I have been looking for my perfect green pen and thanks the heavens for TWSBI!! You NEED this pen, so yes, you should add to cart. I’m almost finished with my first full fill on this pen after a week of writing, and I cannot wait to try another ink in it!
1 person found this helpful
Great color to add to...
March 6, 2025
Verified Purchase
Great color to add to my collection of TWSBI’s
suecoolfl
It writes smoothly and...
March 4, 2025
Verified Purchase
It writes smoothly and is a beautiful pen -- well worth the cost!
hallowed nebulae

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