• Standard ink cartridges suitable for use in fountain pens • Product from the Staedtler Premium range, which guarantees high quality and durability • High capacity ink cartridges, with double the ink of standard cartridges • Easy to use and replace, just remove and place inside the fountain pen • Environmentally friendly ink cartridges and very efficient for the user • Dimensions (Length x Width x Height cm, Weight g): 5 x 4 x 1, 10