TWSBI Diamond 580 Piston Filler Fountain Pen – Clear

• Edition: Clear — The classic standard edition featuring polished chrome trim and crystal-clear resin
• Nib: Stainless Steel — Precision Jowo nib (Silver finish) for smooth, consistent flow
• Filling Mechanism: Piston Filler — Internal piston draws ink directly into the barrel (approx. 1.9ml capacity)
• Ink Capacity: Massive — Holds 3x more ink than a standard converter
• Body: Diamond Faceted — Crystal clear resin barrel catches the light and prevents rolling
• Maintenance: Fully Serviceable — Includes wrench and silicone grease for home disassembly
• Dimensions: 142 mm capped, 30g weight — Perfectly balanced for daily writing
• Origin: Made in Taiwan — Precision engineered for durability

About the TWSBI Diamond 580 Piston Filler Fountain Pen – Clear

The TWSBI Diamond 580 Piston Filler Fountain Pen – Clear is the definitive modern workhorse for writers who prioritize function and aesthetics. This is the model that made TWSBI famous, featuring a completely transparent body paired with polished chrome trim, offering an unobstructed view of your ink color and the pen’s inner engineering.

Unlike the "ALR" models, this classic version features a smooth, crystal-clear resin grip. This provides a warm, comfortable hold and allows you to see the ink flowing all the way down to the feed—a favorite feature for demonstrator pen enthusiasts.

Ideally suited for bottled ink enthusiasts, it features a high-capacity piston filling mechanism that holds approximately 1.9ml of ink—nearly 3x the capacity of a standard converter. The diamond-faceted barrel is designed to catch the light like a jewel while also preventing the pen from rolling off your desk when uncapped.

True to TWSBI’s philosophy of user empowerment, the pen arrives in a presentation box that includes a wrench and silicone grease, allowing you to fully disassemble and lubricate the mechanism yourself—ensuring your pen lasts a lifetime.