HP C4848A No 80. Ink Cartridge 350ml yellow for Designjet 1000 series. Page life - 4400.Compatible Printers: Output Solutions VP 2020, HP DesignJet 1055 CM, HP DesignJet 1050 C, HP DesignJet 1050 C Plus, HP DesignJet 1055 CM Plus, C.Itoh VP 2020