The printer Canon Pixma MG7150 request 6 ink tanks including a cartridge "gray". But this lot, also very advantageous, does not offer the cartridge it can identify as the color "gray": I tried with another cartridge of the lot: she does not want two identical color cartridges. I solved the problem by adapting it compatible cartridge into another brand, otherwise you have to force the issue with OK directly to the printer, so more super nice feature of Wi-Fi.
