This Montegrappa Nero Uno Linea Duetto collection reinvents this historic pen design, yet remains true to the original character. The lined, octagonal shaped barrel is now topped with an all metal cap that is etched with the Linea pattern and then plated in 18k rose gold. This striking change still has the traditional Montegrappa 1912 top, recognized as the ultimate Montegrappa signature. The fountain pen sports an 18k gold nib which carries a modern Montegrappa design. Converter or cartridge filled. Rollerballs use quality, long-lasting refills in black or blue; twist-top ballpoints fill with a wide range of ink choices and colors.