Work smart. The legendary quality and reliability of HP is built into the HP LaserJet Q6511 (11X) print cartridge, delivering professional print quality and excellent value to your business. You can count on great results every time because HP cartridges and HP printers are designed together. HP's microfine toner formula and all-in-one cartridge components are precisely matched to provide consistently sharp text and smooth grayscale transitions throughout the life of the cartridge. Innovative HP Smart Printing technology in HP supplies and the printer saves you time and lowers overall printing costs. The system estimates how many pages can be printed with the supplies remaining to ensure your print job is successfully completed. You receive automatic alerts when a cartridge is low or out.