GOLD LEAF Jinhao Fountain Pen Ink Cartridges Refills, Disposable and Universal - 3.4 mm Bore Diameter 50Pcs Ink Cartridges Jar for School Student and Office (Black)

Features

• Material: Plastic + Ink.Bore diameter: 3.4mm Jinhao Ink Cartridges..Quantity: 50pcs/set
• Please remove the converter(ink pump) from the pen first, then stab the small part of the ink cartridge to the pen body(you will feel and hear a "click" which means the cartridge installed in right place) , and please wait a minute for let the ink flow to the nib. If did not work, please change one other ink cartridge to try again
• Size information: cartridge diameter is about 3.4 mm, length is about 2.1inch/ 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
• 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
• Ideal Gift For Student,Office.Thanking Gift For College Friends,Office office colleagues To Smooth Writting Experience