Sketching pens with water and alcohol resistant ink. Perfect to use with Copic markers, they are available in a variety of sizes and colors.
The most popular Copic marker - Copic Sketch - COPIC Official Website
Alcohol Resistant Copic Drawing Pen - COPIC Official Website
コピックスケッチ チャオ マルチライナー セット
Copic : Multiliner : Pigment Pen Sets - Pen Sets - Sketching and
Copic Multiliner SP
Copic Multiliner .05mm - Black
Copic Ciao Hatsune Miku Set - COPIC Official Website
How to Use – COPIC Official Website
コピック(スケッチ・チャオ)、コピックマルチライナー