TWSBI Eco Fountain Pen, Black Marble
TWSBI Eco Fountain Pen, Black Marble
TWSBI Eco Fountain Pen, Black Marble
TWSBI Eco Fountain Pen, Black Marble
TWSBI Eco Fountain Pen, Black Marble
TWSBI Eco Fountain Pen, Black Marble
TWSBI Eco Fountain Pen, Black Marble
TWSBI Eco Fountain Pen, Black Marble
TWSBI Eco Fountain Pen, Black Marble
TWSBI

TWSBI Eco Fountain Pen, Black Marble

Variant
$60.00
The TWSBI ECO fountain pen delivers exceptional value with a smooth piston filling system at an accessible price point. It features a crystal-clear acrylic barrel so you can easily see your ink level, paired with a marbled black cap and finial. An inner cap helps create a tight seal when the pen is stored, while bronze PVD trim and a matching stainless steel nib complete the look.

The Black Marble finish is created using a specialized injection-molding technique that produces unique patterns and color variations—no two pens are exactly alike!

Piston Filler Fountain pen
Simply unscrew the end cap, dip into ink, screw back the end cap, and you're done! Ready to write!

True to TWSBI’s philosophy, the ECO is designed to be fully disassembled and reassembled, letting users experience the mechanics of a traditional fountain pen. Each pen includes a wrench and silicone grease for long-term maintenance; these tools are not meant for immediate use. If you choose to disassemble the nib and feed, please handle with care, as the feed is delicate.
  • Choose from EF, F, or M nib sizes
  • This pen only uses bottled ink. Ink is not included.
  • Screw cap
  • Piston filling system
  • Features an inner cap to insure a perfect seal when stored away
  • Upon arrival, some ink from may be visible on the nib from dip testing at TWSBI. We recommend cleaning before use
  • Please use care if you disassemble the nib and feed, as the feed is very fragile
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TWSBI (pronounced TWIZ-BEE) has become a staple in the fountain pen community, known for its high-quality, piston and vacuum-filling demonstrator pens at an exceptional value. Though it may seem like a newer brand, TWSBI’s history spans over 50 years as Ta Shin Precision, an OEM manufacturer producing parts for well-known brands. A decade ago, the company shifted to designing its own pens, combining traditional craftsmanship with modern innovation.

With a name inspired by Chinese calligraphy, TWSBI is dedicated to creating durable, high-performing pens featuring smooth stainless steel nibs, excellent cap seals, and transparent designs that showcase their intricate filling mechanisms. Their user-serviceable approach, with included tools for maintenance, makes them a favorite among writers, professionals, and pen enthusiasts looking for reliability, style, and a hands-on writing experience.