The TWSBI Diamond 580ALR comes with a  piston ink-filling mechanism and has all detachable parts. The clear demonstrator barrel allows you to see your ink colour and remaining ink level. This special edition fountain pen has a deep teal blue aluminium grip section, cap ring, and piston knob. The aluminium is enhanced with a subtle matte finish, with circular engravings in the grip and cap area. It comes with a stainless steel nib and is presented in a modern clear display case.

The idea behind the TWSBI Diamond 580 was to go back to basics and capture the simplicity and elegance of traditional writing instruments. In recent years, the development and modernization of writing instruments have resulted in traditional writing instruments, such as fountain pens, falling into obscurity. It was TWSBI's goal to bring the past back to life by creating a traditional fountain pen that even modern-day society can appreciate.

The TWSBI Diamond 580 is a classic fountain pen with a piston ink-filling system. By fusing the traditional mechanisms of the fountain pen with a modern industrial design, TWSBI has created an eye-catching fountain pen that is simultaneously appreciative of the past and relevant in the present.

A quick no brainer guide in choosing nib sizes in an overly complicated fountain pen world:

If you write small, go with an EF
For the normal writer, F is the most popular
If you tend to lean on a bigger font, M will be perfect
B is for statements!! Sign a cheque in B, write a header in B, do some colouring/shading in B
Stub nibs are italic in writing style (have a special card or invitation to write?)

TWSBI nibs tend to be a bit broader than traditional nibs, so choose one grade finer than what you are used to.