Kuretake Sumi Brush Pen- RefillsAn elegant pen that has a sumi brush tip made from white synthetic nylon. The tip is very soft and flexible offering various sumi brush strokes. This fountain pen is ideal for traveling and is very popular with our local customers.The ink refills for the Kuretake pen come in packets of 5. Simply unscrew the knib pull out the expended ink cartridge and snap in a new one. You are ready to keep on using your pen!