**Feature** Genuine Noodlers Branded Quality Green Grain Body & Cap Fountian pen Piston Filling System for Bottled Ink Takes any fountain pen ink From Noodler's Ink - the Ahab Flex Nib Piston Fill Fountain Pen. Even with the classic design and a steel flex nib， this pen is remarkably affordable. Made from a celluloid derivative that makes it technically biodegradable- these pens should never be cleaned with alcohols.