Includes: Compatible Toner Cartridge Replacement for HP 87X CF287X High Yield (Black, 4-Pack) Compatible with: HP LaserJet Enterprise Enterprise LaserJet: M506dh, M506dn, M506n, M506x, M527c, M527dn, M527f, M527z LaserJet Pro: M501dn, M501n LaserJet Enterprise Flow: M527c, M527Z Page Yield*: 18,000* 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. *at 5% coverage (ISO/IEC standard) Color: Black Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.