HP OfficeJet Pro 8500 All-in-One use HP 940 / 940XL high capacity cartridges. HP 940 (C4902AE ) Black , HP 940 Black – Yellow (C4900AE ), HP 940 Cyan – Magenta (C4901AE ), HP 940XL Black (C4906AE ), HP 940XL Cyan (C4907AE ), HP 940XL Magenta (C4908AE ), HP 940XL 3-Colour Pack (Ink CG898AE), HP 940XL Yellow (C4909AE ). HP OfficeJet Pro 8500 All-in-One use HP 940 / 940XL high capacity cartridges. HP 940 (C4902AE ) Black , HP 940 Black – Yellow (C4900AE ), HP 940 Cyan – Magenta (C4901AE ), HP 940XL Black (C4906AE ), HP 940XL Cyan (C4907AE ), HP 940XL Magenta (C4908AE ), HP 940XL 3-Colour Pack (Ink CG898AE), HP 940XL Yellow (C4909AE ).