With a JUSTUS fountain pen, you may adjust the 14 karats gold nib tension to be as hard or soft as you like. By twisting the adjuster, the adjust plate, also in 14 Karats gold, moves back and forward, allowing you to adjust the firmness of the nib to suit your writing style. JUSTUS may even permit to write in a decorative hand. JUSTUS is available in 2 different nib sizes: Fine and medium.