Source google image: https://ae01.alicdn.com/kf/HTB1yqJ6KFXXXXaZXFXXq6xXFXXXP/Japanese-brand-comics-professional-tools-Cartoon-pen-dip-pen-cartoon-replace-G-pen-nib.jpg_640x640.jpg
Aliexpress g pen
Source google image: https://ae01.alicdn.com/kf/HTB1yqJ6KFXXXXaZXFXXq6xXFXXXP/Japanese-brand-comics-professional-tools-Cartoon-pen-dip-pen-cartoon-replace-G-pen-nib.jpg_640x640.jpg