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A stunning fusion of engineering and artistry, the TWSBI ECO Cosmos Blue Onyx is designed for writers who demand performance, beauty, and everyday reliability. Inspired by the mystique of deep space, this edition features a mesmerizing blue-onyx resin body with transparent elements that reveal the precision-crafted piston mechanism inside — a signature TWSBI hallmark.
Smooth, balanced, and built for serious writing, the ECO delivers an effortless ink flow and exceptional comfort, making it the perfect companion for journaling, note-taking, signatures, or gifting.
Striking Cosmos Blue Onyx limited colour edition
Reliable piston-filling mechanism — holds more ink than cartridge pens
Crystal-clear barrel accents to showcase the ink reservoir
Stainless steel nib (available in a range of sizes) for smooth, consistent writing
Lightweight yet sturdy — perfect for daily carry
Secure, snap-fit cap to prevent ink dry-out
Designed for easy disassembly & cleaning
Exceptional value from one of the world’s most trusted writing brands
Brand: TWSBI
Model: ECO – Cosmos Blue Onyx
Nib Material: Stainless Steel
Filling System: Piston Filler
Body Material: Resin with transparent components
Cap Type: Screw-on
Ink Capacity: High-capacity piston reservoir
Packaging: Premium TWSBI gift box with wrench & silicone grease
Students & professionals
Fountain pen beginners upgrading to a serious writer
Long writing sessions
Everyday journaling
Gifting to pen lovers
Collectors of special-colour TWSBI editions
Buy your TWSBI Eco Cosmos Blue Onyx Fountain Pen from Makoba!
Ships within 48 hours · Estimated delivery Jun 20 - Jun 25
US$40
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