Description This modern Conklin black-plated steel Medium nib unit is a complete all-in-one nib and feed unit which screws into your Conklin fountain pen. Remove the converter or cartridge first, before swapping the nib unit. ** Please note that this nib will not fit vintage Conklin fountain pens and will only fit modern Conklin fountain pens. ** We offer Free Shipping on all orders over $59 for US customers, and for orders over $250 for our Canadian customers.