By installing an Q-Connect Black HP LaserJet 4000 compatible Laser Toner Cartridge (OB-T27X) you can enjoy amazing quality printouts at an economical price. Though designed to be more economical than official cartridges, Q-Connect products don't skimp on quality. This cartridge is engineered to meet or exceed the same yield and quality standards as official HP cartridges. As a standard yield cartridge, it comes packed with enough colour toner to print 10,000 pages.