YSTD&reg; Practical Student Extra Fine Iridium Nib Fountain Pen Accounting Black Brand: Hero, which is one of the oldest and most respected brands in China The fountain pen also has an easy to use screw top suction system to take ink from a bottle, no cartridge need Diameter: about 1.0cm/0.39"(approx) Pen: Black barrel, Silver clip and trim Length: 13.2cm/5.19"(approx)