Item Details:
Brand : Jinhao
Nib Size : 
Extra Fine (EF, about 0.4mm); 
Fine (F, about 0.6mm); 
Medium (M, about 0.8mm)

Package: 
 3PCS Nibs 

PS: These nibs are compatible with jinhao X350, X850, 100, 100 skeleton, 9036,9056 pens.