The TWSBI Diamond 580ALR features a piston ink-filling mechanism, and stainless steel nib in several nib sizes. The clear demonstrator barrel allows you to see your ink color and remaining ink level. The aluminum in the new 580ALR has been updated with circular engravings in the grip and cap area, and a subtle matte finish.

The idea behind the TWSBI Diamond 580AL fountain pen was to go back to basics and capture the simplicity and elegance of traditional writing instruments. The Diamond 580 is a classically styled fountain pen with a piston ink-filling system, smooth-writing steel nib and a screw-on cap. The traditional mechanism of the fountain pen, combined with a modern industrial design, embodies both the past and the present.

The TWSBI Diamond 580 piston ink-filling system uses only bottled ink and the clear body with colored aluminum grip and piston, allows the user to view the level of ink remaining in the pen at all times. The Diamond 580 fountain pen has all detachable parts, as TWSBI felt that it was important to allow the user to disassemble and reassemble the pen and completely experience the traditional aspects of owning and using a fountain pen.