The HP 938 Yellow Original Ink Cartridge (part 4S6X7PE) is a standard-capacity genuine HP ink cartridge for the HP OfficeJet Pro 9100 and 9700 series business inkjet printers and all-in-ones. HP's product page lists it for models including the OfficeJet Pro 9110b, 9117b and 9122 All-in-One and the 9720e Wide Format All-in-One, and the supplier's listing covers the 9110b, 9120/9120b, 9130/9130b and 9700/9700e series. It is rated at approximately 800 pages of colour printing under the ISO yield method. HP positions the 938 inks for professional-quality business documents: vibrant colours alongside sharp black text, with the reliability of original HP supplies. The pack contains one cartridge, supplied in HP's hanging card (blister) retail pack, which is what the "Blister" in the supplier name refers to. Check the cartridge number on your printer before ordering - the 938 is not interchangeable with the 925 cartridges used in the smaller OfficeJet Pro 8100 models. Used cartridges can be recycled through HP Planet Partners where available.