nib uses for Calligraphy handwriting with all writing's type to using such as: Copperlate, Spencerian, Ornamental.
the same nikko, but higher hardness, higher quality.
using for many ink's type and many type of hilt of the pen to reach satndard
this isn't a product in calligraphyart and drawing
Anh Duong Education Equipment Company Limited is the pioneer research, content development and manufacturing programs, providing products handwriting such as: Flat Tip Fountain Pen, practice calligraphy books, products specialized calligraphy... The company has been confirmed by prestigious brands in the country.