This is a Calligraphy Dip Nib. All you need is the wooden barrel to easily snap the nib down into and a jar of ink to dip the nib into, then write! It’s quite the novel experience for children who have learned to write with a modern calligraphy pen to try it this way.
We recommend getting at least 2-3 but we also sell them in a 12 pack.
Go here to find the wooden barrel they fit.