Designed and manufactured to rigorous high standards ndash the philips pfa431 ink cartridge delivers crisp sharp results with laser precision the black ink cartridge is suitable for home users that need a low cost solution without sacrificing on quality the philips pfa431 ink cartridge is quick and easy to install ndash you can be up and running within seconds the philips pfa 431 cartridge is exceptionally consistent ndash producing great results from the first page to the last if you