The Pro Nib Sampler
If you’re a professional calligrapher, I highly highly suggest these 4 nibs for you to try out!
contains one each of : Gillott 303, Gillott 404, Hunt 101, Hunt 56 Nib
These highly flexible nibs allow you to make fine hairlines and beautiful shades, especially Gillott 303 and Hunt 101. Each of these nibs has been loved and recommended by all the master penmen for years now :)