Jinhao Fountain Pen Ink Cartridges Refills, Disposable and Universal – 3.4mm Bore Diameter 30Pcs Ink Cartridges Jar for School, Student, and Office (Blue Black)

Safe and Non-Toxic: Rest assured knowing that the ink is crafted from safe, non-toxic materials for everyday use.

Smooth Writing Experience: Ensures uninterrupted ink flow, providing a clear and elegant writing experience. The ink resists blocking and leaking, making it perfect for students and professionals alike.

Durable and Reliable: Made for consistent performance and ease of use, with excellent ink coverage.

Easy Ink Replacement: Simply insert the narrow end of the cartridge into the pen’s section block. The cartridge seal will be punctured, allowing ink to flow seamlessly.

Portable and Convenient: Compact design allows for easy carrying in bags, backpacks, or pouches.