Sketching pens with water and alcohol resistant ink. Perfect to use with Copic markers, they are available in a variety of sizes and colors.
Copic - Wikipedia
Copic Sketch 6 colors set Portrait - 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
This Copic Drawing Pen is made for those who prefer the feel of sketching and writing with a classic stainless steel fountain pen tip. Disposable, with a 0.1mm line width. Black Copic proof ink won't bleed when used with Copic markers.
Copic Markers F01 Drawing Pen, Black
The most popular Copic marker - Copic Sketch - COPIC Official Website
Copic Multiliner SP drawing pen review – Ian Hedley
Copic Multiliner Drawing Pen 0.3mm Assorted Set of 10
コピック(スケッチ・チャオ)、コピックマルチライナー
Copic : Multiliner Sp : Pens
コピックスケッチ 49色セット
Product Description Multiliner SP inking pens are pigment based and provide the highest quality for all your inking needs. Ink cartridges and replacement nibs are available so you never need to throw these durable aluminium bodied pens away. This set contains all 10 Multiliner SP sizes 0.03mm 0.05mm 0.1mm 0.2mm 0.25mm 0.3mm 0.35mm 0.5mm 0.7mm Brush.
Copic Multiliner SP Set, 10 Pens
コピック(スケッチ・チャオ)、コピックマルチライナー
Sketching and Drawing Pens, Copic Multiliner - COPIC Official Website
Copic Multiliner SP
Copic Ciao Hatsune Miku Set - COPIC Official Website