Replaces the Following Manufacturer Numbers: HP C4127X (HP 27X). Compatible with the Following Printer Models: HP HL-2460, HP HL-2460N, HP LaserJet 4000, HP LaserJet 4000N, HP LaserJet 4000SE, HP LaserJet 4000T, HP LaserJet 4000TN, HP LaserJet 4050, HP LaserJet 4050 usb-mac, HP LaserJet 4050N, HP LaserJet 4050SE, HP LaserJet 4050T, HP LaserJet 4050TN.