AZ Supplies &copy; Compatible Replacement High Yield Laser Toner Cartridges for HP 507A 507X, CE400X, CE401A, CE402A, CE403A for use in HP LaserJet Enterprise 500 color M551dn,M551n,M551xh,MFP M575dn,M575F Page Yield: Black:11,000; Colors:6,000. Replaces OEM CE400X-03A set. The compatible toner cartridges will produce the same amount of page yield as an OEM cartridge would. WARNING: Avoid poor quality knockoffs from other sellers; order directly from AZ Supplies ( MPSCAL ) Toner to receive the exact product listed and ensure superior quality. Premium Quality Compatible Toner Cartridge is made by ISO9001 Certified Factory to Meet or Exceed OEM Standards. All AZ Supplies brand products are backed by '100% Quality Satisfaction' 1 year warranty against defects in materials and workmanship for all toner products. Free tech support for any problems for all AZ Supplies brand products. The use of AZ Supplies brand Compatible laser toner cartridges and supplies does not void printer warranty. These units are manufactured 100% brand new with all new parts including OPC drums, wiper blades, a smart chip and other internal parts, they are an economical alternative to expensive OEM laser toner cartridges.