Kuretake No. 7 Brush Pen
It just takes a few steps to get your Kuretake No. 7 Brush Pen up and running. Unscrew the pen barrel and insert the wide end of one ink cartridge until you feel it click into place. Store the other cartridge in the barrel of the pen. Once the ink has flowed down into the tip, you’ll be impressed with the range of options that this tool gives you, from sketching to coloring to calligraphy.