Features: Non-Toxic Ink: The calligraphy pen ink has been carefully manufactured using only natural dyes giving the composition a natural, and non-toxic ink. Enough Quantity: The package contains 8 pieces fountain pen ink, you can replace or fill you pen conveniently, and the sufficient quantity will satisfy you various needs. Easy to Use: Independent ink tube, easy to carry and use, take out the pen of the suction apparatus, and then put the ink sac, after a few seconds can be writing. Wide Application: They are suitable for daily writing use in school, office, home, you can also use them to make card, write letter, make crafts and so on. Intimate Service: If you have any questions about our products, please feel free to let us know. We will provide you with quality service. Specifications: Material: Ink Color: Black, Red, Pure Blue, Blue Black 8 Pcs * Ink Sac