TWSBI Eco Irish Green with Onyx Fountain Pen

Size: STUB 1.1
₹. 8,750

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TWSBI Eco Fountain Pen – Irish Green with Onyx

The Eco Irish Green with Onyx pairs a deep, forest-green acrylic barrel with a contrasting Onyx cap and piston knob — a striking two-tone finish on TWSBI's best-selling piston filler. The demonstrator barrel still lets you keep an eye on the ink level and piston mechanism.

A polished stainless steel nib is available in five sizes, and the threaded cap posts securely on the back of the pen for balanced writing. An inner cap keeps the nib sealed and ready to write even after weeks unused.

Key Features

  • Forest-green demonstrator barrel with contrasting Onyx cap and piston knob
  • Piston filling mechanism, holds up to 1.7ml of ink
  • Stainless steel nib, available in five sizes
  • Threaded, postable hexagonal cap with inner seal
  • Fully disassemblable for cleaning and maintenance

Brand TWSBI
Product Origin Taiwan
Product Type Fountain Pen
Colour Irish Green with Onyx
Nib Material Stainless Steel
Nib Size Extra Fine, Fine, Medium, Broad, Stub 1.1
Body Material Resin (Demonstrator)
Trim Chrome Plated
Ink Filling Mechanism Piston Filler (~1.7ml Capacity)
Cap Mechanism Threaded, Postable

It uses a piston filling mechanism that draws ink directly from a bottle, holding up to 1.7ml — no cartridges or converters needed.

It pairs a deep, forest-green barrel with a contrasting Onyx black cap and piston knob.

This pen is available in Extra Fine, Fine, Medium, Broad and Stub 1.1 stainless steel nib sizes.

It's made by TWSBI in Taiwan.