HP Color LaserJet toner cartridges and supplies are the only supplies that have been specially designed, engineered and formulated to work together with the HP Color LaserJet 4500 and 4550 series printers to ensure consistent color and optimum output every time you print. • backed by HP limited lifetime warranty • black • Page yield: 9,000 pages based on 5% average coverage • Compatibility: works with HP Color LaserJet 4500 series and 4550 series printers