Uncluttered by bold colors, the Monteverde® Invincia™ emphasizes contrast and simplicity. Straight forward and always classic, the Invincia™ ballpoint pen, rollerball and fountain pens will compliment all fashions, styles and trends to come. The Invincia™ fountain pen’s flexible stainless steel nib is available in fine, medium, broad and stub sizes and accepts ink cartridges or ink converter.Fountain pen fills with Monteverde® standard international G3 ink cartridges or piston ink converter (included).The flexible stainless steel nib is available in fine, medium, broad and stub sizes. Ballpoint accepts P1 and P4 refills and the capped rollerball accepts the G2 and W2 refills.