Specifications: This brush pen has a grip that is gentle on the hands and is made to look like a brush brush on the road. It is easy to hold and allows you to write beautifully even more brushstrokes. Product Size: 0.5 x 7.0 inches (12 x 179 mm) (including Lillian); Ink Color: Black; Writing Line: Approx. 0.01 - 0.04 inches (0.3 - 1.0 mm); Water based pigment ink; Serise pack.