The HP 89X is an original high-yield black toner cartridge for HP LaserJet Enterprise M507 printers and M528 multifunctions, rated at about 10,000 pages. It suits workgroups of 3 to 10 users printing roughly 750 to 3,500 pages a month who want fewer cartridge changes and a lower cost per page. HP JetIntelligence technology gives sharp black text at the printer's full speed, maximises pages per cartridge and includes HP anti-fraud protection so you know you are getting a genuine supply. EcoSmart black toner is designed to help save energy while printing. The cartridge is easy to install and can be returned through the HP Planet Partners recycling programme where available. One black cartridge is supplied. After comparing online prices, www.marvel.co.za should be the cheapest on this product.