Set includes the following compatible cartridges: HP 305A CE410A (Black, 6-Pack) Page Yield* Per Cartridge: 4,000* For best results, store in a cool, dry place. Use within 3 years of purchase for optimal performance. *Average cartridge Page Yield* in accordance with ISO IEC 24711 This is the Compatible Higher Yield Version of HP 305A CE410A Black. *at 5% coverage (ISO/IEC standard) Compatible with HP LaserJet 300 Color MFP M375nw, HP LaserJet 400 Color M451dn, HP LaserJet 400 Color M451dw, HP LaserJet 400 Color MFP M451nw, HP LaserJet 400 Color MFP M475dn, HP LaserJet 400 Color MFP M475dw. Color: Black Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.