Noodler's Ink Ahab Piston Fountain Pen - Green Bay you are buying ONE Noodler's Ink Ahab Green Bay Piston Fill fountain pen flex nib is fine/medium; ink line dependent upon pressure placed on the nib piston fill; takes any fountain pen bottled ink length closed: 5 1/2" posted: 6 3/4"; weight: 0.7 oz Instructions on how to use a piston fill fountain pen are included from Noodler's Ink