100 Pieces Blue Black Pen Ink Cartridge Fountain Pen Cartridges Refillable Fountain Pen Cartridge, 3.4 mm Bore Diameter

Note: this product is not suitable for all fountain pens, the size of the product is not the standard size, please measure the size of your fountain pen correctly before purchase and make sure that your fountain pen has 3.4 mm ink cartridge installed; To avoid soiling your clothes, use the correct installation method, Size information: cartridge diameter is about 3.4 mm, length is about 2.1 inch/ 5.2 cm, size is suitable for fixed size pen, please confirm that the product diameter is consistent with the diameter of the interface on your pen before purchase, Quick to dry: with quick drying ink, you can no longer worry about the words you just wrote will be rubbed off or dirt your hands and clothes after a few seconds, ensuring your important writing moments are not ruined by smudges or smears, Smooth writing experience: the ink cartridge contains good ink in blue and black, ensure you a smooth and unimpeded writing experience as your fountain pen glides elegantly across paper, not easy to block the ink holes and leak, a good assistant in your life, What you get: you can get 50 pieces blue ink cartridges and 50 pieces black ink cartridges, definitely enough quantity for you to use and replace, you can also share with classmates, colleagues, friends, families and more.If you have any questions, please contact our staff and they will be happy to help you solve them