TWSBI Diamond 580ALR Black Fountain Pen - Clear body with Black trimClarity with a sharper edge The TWSBI Diamond 580ALR Black Fountain Pen takes everything people love about the Diamond 580 and strips it down to its most focused form. Clear demonstrator body, with matte black aluminium trim. More geometry than softness, to make it feel like a drafting tool for precision, but still flexible enough for creativity. Uses the proven 580 piston and nib, for a reliable everyday writer. What sets it apart Matte black