US remanufactured for HP 831A (CZ687A) Light Magenta Latex 775-ml cartridges. These are the highest quality wide format replacement cartridges on the market. Using only HP 831A (CZ687A) Light Magenta Latex 775-ml OEM cartridges, we remanufacture each cartridge to the highest quality standards to match OEM ink level, color, with performance guaranteed!