TWSBI’s Diamond 580 features a piston-ink filling system and has a smoother cap thread turn. This Navy Blue fountain pen has a matte finish and a large ink reservoir that provides more ink capacity. The parts are detachable for cleaning convenience.
Body Material: Resin
Nib Material: Steel
Grip Material: Aluminium
Cap Mechanism: Screw-cap
Available Nib sizes: Extra Fine (EF), Fine (F), Medium (M), Broad (B), and Stub 1.1