Exquisite?JINHAO?pen, easy to carry,and convenient your work and study!You just need to pay a low price you can own this exquisite masterpiece !Pen Maintenance: How to maintenance your fountain pen / ballpoint roller:1. Clean pen with lint & grease-free cloth usually to keep it new & clean.2. Only high quality ink & ink cartridge ensure peak performance. Mixed ink forbidden to use. Please completely clean the pen before using other kind of ink or ink cartridge.