Repair the print head Fit for HP 831 Latex Printhead CZ677A CZ678A CZ679A CZ680A Print Head fit for HP Latex 110 115 310 315 330 335 360 365 370 560 570 (Color : 1Set 4 Pieces): Amazon.co.uk: Computers & Accessories
LD Compatible 831 Optimizer Latex Ink for HP - LD Products
HP 831 Value Pack Ink Cartridge HP 831A Value Pack HP 831 Value Pack