With the HP 507X Laser Toner in Black get the best results out of your HP printing system. HP Smart technology and chemically-grown toner formulas in HP colour LaserJet print cartridges work with your printer to deliver accurate, consistent colour and reliable, cost-effective performance. Accurate colour, precise image reproduction and crisp, sharp text every time you print. Chemically-grown toner and HP Smart printing system technology deliver consistent results and reliable performance throughout the life of the cartridge. HP Smart technology makes automatic adjustments to optimize print quality and enhance reliability. Minimal user intervention saves time, improves productivity and lowers overall printing costs. Enjoy low maintenance, trouble-free printing. HP Smart technology in the toner cartridge and your printer makes HP supplies easy to install and maintain. Receive automatic alerts when a cartridge is low or out. Enjoy convenient, on-line ordering.MPN: CE400XThis toner is for use in the following machines:-LaserJet Enterprise M551 Series Colour Laser PrintersPage yield: Up to 11.000 pages.. Please note that this item is delivered direct from our supplier and may take a little longer to arrive.