Mr Hobby Gundam Marker for plastic model kits - Gray (Brush Type) GM-21

This is felt tipped or other porous-tipped pens and markers.

A grey, "Gundam marker" that features a soft, brush-like tip for helping get markings into fine crevices.  Uses a mild, water-based paint that can be safely applied over all other paint types, and can be wiped off as necessary using a cotton swab or tissue.