1.Log penholder, selection of cypress wood, soft treated wood easy to sharpen 2.Bright color, A5 core. High color fastness not easy to fade 3.High quality color core, 3.3 mm diameter , broken resistable, smoothly writing 4.SV adhesive technology, to ensure the color core 100% glue with barrel 5.Unique box design, tin box structure, can be opened by pressing the box corner 6.Watersoluble，catch the gouache effect