G-pen comparison & Sekaido

G-pen comparison (Zebra & Nikko)
& Sekaido(世界堂) Art Supplies shop

http://www.youtube.com/watch?v=q4wG6dQTpDA

vamosermangakas asked me a cool question:
what is the difference in the g pen of Zebra, and Nikko ?


I did replied with "text", but .... "text" is not really helpful
So I decided to make a video about it.
In this video, I also take you to the biggest Art Supplies shop in Tokyo. Sekaido.

Please enjoy.

Thank you.