I am interested in your printer HP OfficeJet Pro 9120e All-in-One. https://www.digitec.ch/de/s1/product/hp-hp-officejet-pro-9120e-all-in-one-tintenpatrone-farbe-drucker-40160100 At the same time I would like to order ink cartridges, but it is completely unclear which ones fit. I have found out that they are HP 937. But what are the differences? Do all these 21 versions according to the link below fit? If so, what are the differences? https://www.digitec.ch/de/search?q=HP+937 Interestingly, when I want to order these cartridges, for example, the 9120e model is not listed in the compatible printer models. https://www.digitec.ch/de/s1/product/hp-937-m-bk-c-y-druckerpatrone-37836330 As I can't find a telephone number anywhere, I'll just contact you this way, which I find very inconvenient.