This Original HP 644A (Q6462A) Yellow Toner Cartridge features HP`s ColorSphere technology meaning you can achieve the highest quality sharp, glossy text and images page after page, for the life of the Cartridge. Hewlett Packard`s ColorSphere technology also improves your Printers speed making this product ideal for a busy office environment.You can improve running costs with the Genuine Q6462A Yellow Toner Cartridge as it comes with a healthy page yield of 12,000 (based on a 5% coverage). This HP 644A Toner Cartridge has been designed to work in harmony with Hewlett Packard`s Laserjet 4730 Series of Printers and comes with our 100% satisfaction guarantee.