The ink cartridge for sharp writing. Everyone understands the frustration of a pen running out of ink at the crucial moment. Just before a career-boosting conference, you certainly don't want your pen to run dry. Prepare in advance and equip yourself with replacement cartridges. For this, you can get the best replacement ink cartridges available on the market: from the Japanese expert Uni-Ball. They are compact, comfortable, and high-performance. Ink on your clothes and hands is a nightmare and also unprofessional. The ink in this cartridge is in gel form, which makes it look extremely professional on paper and protects you from accidental ink leaks. The highly functional writing tip ensures a consistent 0.4 mm wide ink flow for crisp, clear text.