Compatibility: NON-Standard size. Specifically designed with a 3.4mm bore diameter, compatible only with fountain pens accepting 3.4mm cartridges.
Generous Quantity: Includes 72 cartridges packaged neatly in 4 boxes, each containing 18 cartridges—providing an ample supply for frequent writers.
Smooth Ink Flow: Premium-quality ink ensures a consistent and uninterrupted writing experience, making every stroke smooth and reliable.
Vivid and Long-lasting: Rich pigmentation delivers bold, vibrant black ink that resists fading, ideal for professional documents, calligraphy, journaling.
Easy to Use: Quick, mess-free cartridge replacement, perfect for travel, office, school, or everyday writing needs.
