Speedball Series-C broad-edge nibs.
Set of 6 nibs that comes with a plastic case.
 
American calligraphy nibs for Italic, Blackletter (Gothic, Old English), Uncial, Half Uncial, Foundational and many other hands or alphabets. One of the most popular broad-edge nibs for beginners. The gold metal part attached to the nib is the ink reservoir, so you don't have to buy it separately.
 
Sizes:
C-0 = 5mm
C-1 = 4mm
C-2 = 3mm
C-3 = 2mm
C-4 = 1.5mm
C-5 = 1mm
 
Used with a straight pen holder.
*For Right-handed writers only.