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 piston filling system holds far more ink than a cartridge and lets you draw ink straight from the bottle—no converter required! This limited-edition Iris pen features a clear plastic body and metal accents with a beautiful and unique rainbow finish. The nib also includes a matching finish near the tip. Features: Stainless steel nib with a rainbow finish near the tip. High-capacity piston filling system. Wrench and silicone grease for at-home maintenance. Notes: The rainbow finish varies from pen to pen, and no two pens will have the exact same color pattern. This pen only uses bottled ink, which is not included with this pen. Check out our collection of bottled fountain pen inks here! This pen can be refilled from any fountain pen ink bottle, but for clean and easy refilling, try a TWSBI Diamond 50 Ink Bottle, which has a special component designed specifically for refilling TWSBI Diamond fountain pens. This pen may come with ink residue in the nib from being dip tested by TWSBI at the factory. As with all new fountain pens, JetPens recommends giving your TWSBI a good cleaning before you use it. The plastic case is packaged in a protective cardboard box, which may get crumpled during shipping.