HP 507A (CE400A) Black Original Toner Cartridge for HP LaserJet Enterprise 500 551 570 575 HP 507A (CE400A) toner cartridges work with: HP LaserJet Enterprise 500, 551, 570, 575. Original HP toner cartridges produce an average of 71% more usable pages than non-HP cartridges. Cartridge yield (approx.): 5,500 pages 507A toner is designed to work with your HP printer for high quality, reliable results every print. What's in the box: New Original HP 507A (CE400A) toner cartridge Color: Black