Item Details:
Brand : Asvine
Nib Size : 
Extra Fine (EF, about 0.4mm); 
Fine (F, about 0.6mm); 
Medium (M, about 0.8mm)
Package: 3 pcs nibs with black section

PS: These nibs are not standard size, they are only compatible with Asvine fountain pen V169, P20, P30 and V126 Series, not fit P36