TWSBI Diamond 580ALR Fountain Pen - Black

TWSBI's flagship demonstrator, with a faceted clear acrylic barrel and matte black anodized aluminum hardware. The "ALR" designation refers to the aluminum grip and piston mechanism, finished with subtle circular engravings on the grip and cap finial for tactile texture.

Accessories with spare 580 nibs and a matching inkwell specially designed for the Diamond 580.

Why It's Special

• Faceted "diamond-cut" barrel that refracts light through the ink and keeps the pen from rolling
• Higher ink capacity than the ECO — roughly 1.95 ml via the piston filler
• Machined aluminum grip section, connector, and piston rod (the ECO is all resin)
• Engraved tactile grooves on grip and cap finial for slip resistance
• Fully user-serviceable; ships with a wrench and silicone grease for disassembly and maintenance
• German-made stainless steel nib

Specifications

• Type: Fountain pen, fine nib
• Material: Clear acrylic barrel, matte black anodized aluminum section and trim
• Filling: Piston
• Ink capacity: ~1.95 ml
• Cap: Screw closure (posting not recommended — the cap engages the piston when twisted on the back)
• Clip: Spring metal
• Capped length: 142.2 mm
• Body length: 130.2 mm
• Body diameter: 12.7 mm
• Weight: 26.9 g

Please note: TWSBI products are not eligible for discounts.