The HP 90X High Yield Black Original LaserJet Toner Cartridge (CE390X) is the genuine HP supply for HP LaserJet Enterprise M4555 MFP series printers. It prints up to about 24,000 pages, so busy offices change cartridges less often and lower their cost per page compared with the standard-yield version. It contains energy-efficient toner designed to help print at full speed while reducing energy use. Original HP toner is engineered with the printer to give sharp, professional black text and graphics, and helps avoid the leaks, poor quality and wasted pages that can come with cheap clones. Empty cartridges can be returned through the HP Planet Partners recycling programme where available. The box contains one high-yield black toner cartridge. After comparing online prices, www.marvel.co.za should be the cheapest on this product.