The Platinum Curidas offers a gorgeous Japanese steel nib but in a click-retractable barrel. Enjoy the writing experience of a Platinum fountain pen with a simple click! This Curidas comes to you in a Prism Crystal demonstrator barrel allowing you to see the engineering within! Instead of a traditional fountain pen cap, the Curidas houses and internal seal / door to protect the nib when retracted into the pen. The Curidas accepts Platinum proprietary cartridges or a Platinum converter to fill with bottled ink.