During production, the inkjet cartridges of the type HP C6578A/D (78), HP C1823D/G (23) and HP C6625A (17) are assembled from several components. To obtain an optimum service life, the wings on the sides of the cartridge interlock similar to a gear wheel. As a general rule, these wings do not impair the functionality of the cartridges. However, the visual appearance of a refill cartridge with broken-off wings does not satisfy the demands of most consumers. This is why this cartridge type is bought at a lower price.