Our most popular Twsbi fountain pens:

  1. TWSBI Eco: Our top seller, known for its affordable price, piston-filling mechanism, large ink capacity, and transparent design. 

  2. TWSBI Diamond 580: The next model up, with a larger nib, more ink capacity and interchangeable nib units. Compatible with the Twsbi Diamond Ink Well. The 580 ALR, with aluminium details and ribbed grip, is the newest model.

  3. TWSBI Vac700R: Loved for its large overall size and vacuum-filling mechanism. Compatible with Twsbi Vac Ink Well. Largest nib in the range.

  4. TWSBI Diamond Mini: Admired for its compact size, piston-filling mechanism, and portability. Compatible with the Twsbi Diamond Ink Well. Same nib as the Eco. Use with the cap posted.

  5. TWSBI Vac Mini: A compact, vaccum-filling pen. Compatible with Twsbi Vac Ink Well. Same nib as the Eco. Use with the cap posted.

  6. TWSBI Classic: A timeless design, with an opaque body, ink window and piston-filling mechanism. Compatible with the Twsbi Diamond Ink Well. Same nib as Eco.

  7. TWSBI Swipe & TWSBI Go: Entry level fountain pens, designed for students. Same nib as Eco.

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