TWSBI Diamond 580ALR Sunset Yellow Fountain Pen Fine Nib (F)TWSBI fountain pens are loved for their high quality and affordability, offering beautiful designs and advanced filling mechanisms normally reserved for much more expensive pens. The Diamond 580 features a modern, eye catching design, with a transparent body that shows off the pen's inner workings. Its faceted barrel catches the light and makes your ink shine, and it also helps keep the pen from rolling away when you set it down. The pen's built in