This is felt tipped or other porous-tipped pens and markers.
This marker can easily express dirt and blurred paint with a realistic touch.
A water-based wipe-off type is used for safety.
Equipped with two types of nibs, fine and thick.
GM400 is a pen for blurring already painted GM401-410.
Use it to blur the boundary surface.
If the nib gets dirty, clean it with a tissue.
If it becomes difficult to remove the dirt, use a new blurring pen.