Sketching pens with water and alcohol resistant ink. Perfect to use with Copic markers, they are available in a variety of sizes and colors.
Sketching and Drawing Pens, Copic Multiliner - COPIC Official Website
Copic Sketch + Multiliner SP Sketching Grays Set - COPIC Official
Copic Multiliner SP Pens - FLAX art & design
Copic Markers Multiliner Pigment Based Ink,0.03mm
コピックスケッチ チャオ マルチライナー セット
Copic Multiliner Pen - 0.3 mm - 10 Color Bundle
Sketching Pen from Copic, Copic Multiliner SP - COPIC Official Website
The most popular Copic marker - Copic Sketch - COPIC Official Website
Copic Sketch 6 colors set Portrait - COPIC Official Website
COPIC Official Website - Copic is a brand of professional quality
Limited-Edition Set Archives - COPIC Official Website