Designed with the latest technology the original HP 643A Yellow toner cartridge includes Coloursphere. This Coloursphere technology makes the HP 643A cartridge the ideal toner for photographic prints achieving 40% glossier results. As you would expect from the Hewlett Packard brand the original HP 643A Yellow toner cartridge guarantees trouble free reliable printing from the first to the very last page. Ideal for home and business use this HP 643A toner cartridge is value for money with it`s high page yield from a brand you can trust.