Genuine HP 953XL ink cartridges (choose from the dropdown menu above):

HP 953XL Black Ink Cartridge - (L0S70AE)

HP 953XL Cyan Ink Cartridge - (F6U16AE) 

HP 953XL Magenta Ink Cartridge - (F6U17AE)

HP 953XL Yellow Ink Cartridge - (F6U18AE)

Past the warranty dates (2023+) but this will not affect the printing performance.

Printer compatibility: HP DesignJet 4520 PS, HP DesignJet 4500 MFP, HP DesignJet 4000, HP DesignJet 4520, HP DesignJet 4520 HD, HP DesignJet 4020 42 Inch, HP DesignJet 4500, HP DesignJet 4000 PS, HP DesignJet 4020 PS 42 Inch, HP DesignJet 4500 PS, HP DesignJet 4520 Series, HP DesignJet 4500 Series, HP DesignJet 4000 Series