Kuretake zig brushables pen for calligraphy

Calligraphy and scrapbooking pen Kuretake Zig Brushables is a brush pen with two tips, one of them is 50% brighter (gray) than the basic color (black). Water, permanent, acid-free. You can create transitions between colors and shading. They give many possibilities for creative applications in calligraphy, lettering and scrapbookin.