The pen tip is a brush that makes it easy to insert strains, and it can also be used for fine carving parts. It uses a special mild water-based ink, so it can be used for painting Gundam markers, and even over painted Gundam colors, MR. or water-based hobby colors, and the protruding area can be wiped off with a cotton swab or tissue. Product Planning: Bandai Co., Ltd. Hobby Division (C) Sotsu, Sunrise.