Features

• Oil Ink Cartridge Replacement Method: (1) Remove the cap on the thick side and hold the tip of the pen and pull it out. (2)Hold the used ink cartridge near the center and pull it out. (3)Remove the cap of the new ink cartridge, insert the tip of the pen firmly while it is still in the case, and then remove the case. (4)Insert the tip of the pen firmly into the pen body.
• Bold replacement core replacement method: (1) Pinch and pull out the used pen core. (2)Insert the new pen core (narrow side) into the hole you pulled out. (3)After ink penetrates the pen core, try writing before use.