TWSBI ECO Cosmo w/ Onyx Fountain Pen B

TWSBI ECO Cosmo w/ Onyx Fountain Pen – Broad Nib

Bold, dramatic, and unmistakably refined — the TWSBI ECO Cosmo with Onyx trim pairs a deep, cosmic body with sleek black accents for a pen that commands attention. Built on the trusted ECO platform, it delivers the same excellent piston-filling system and smooth writing performance in a striking, all-business aesthetic.

• Nib size: Broad (B)
• Body: Deep cosmo translucent body with onyx black trim
• Filling system: Piston fill — large ink capacity for extended writing
• Nib material: Stainless steel
• Ink window: Transparent body allows easy ink level monitoring
• Compatible with: Standard bottled fountain pen inks

The TWSBI ECO Cosmo w/ Onyx is a bold, sophisticated pen that lays down a rich, expressive broad line — perfect for signatures, journaling, and anyone who writes with flair.