The TWSBI ECO represents a great value in fountain pens with its simple design, durable construction, and integrated piston-filling system that holds an impressive 1.8mL of ink!
The stainless steel nib is available in 5 widths: EF, F, M, B, and 1.1 Stub. The ECO differs from other TWSBI pens in that the grip section and barrel are molded as a single unit. Thus, the nib and feed are friction fit and pull straight out rather than being unscrewed as a unit.
Included with the pen is a wrench for removing the piston unit and a small container of silicone grease for lubricating the piston seal.
See the video review below for more details.
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