Black Toner for Lj 4 4+ 4M 4M 5 5M 5N Compatible with HP LaserJet 4, 4M, 4+, 4M+, 5, 5M, 5N, 5Se and 6 (EX) Reduces costs, maintains quality and helps the environment by using premium empty toner cartridges Meets or exceeds OEM performance Use of new long life drum vs. refinished drum Lab-tested components each batch tested and scientifically matched for every cartridge