Jinhao Fountain Pen Ink Cartridges Blue Color, Set of 50 Refill International Standard Size, 2.6 mm Bore Diameter

50 PCS 2.6 mm bore diameter black ink cartridges ( compatible with fountain pens take 2.6mm cartridges such as Jinhao ). Length Appr 50mm; Cartridge Diameter Appr4-6mm; bore diameter 2.6mm. If you not sure if they works with your fountain pens, just send us a message to confirm this. The ink Cartridge has been carefully manufactured using only natural dyes giving the composition a neutral, natural, and non-toxic PH. With no break in ink flow, enjoy a smooth and optimal writing experience as your fountain pen glides elegantly across paper. If there is any reason you do not like our item, just send us a message, we can offer you a full refund or replacement!