Toonerikassett HP C4127X must

HP toner cartridge C4127X black.; Durability: 10000 pages (at 5% coverage).; Compatibility: HP LaserJet 4000, HP LaserJet 4000n, HP LaserJet 4000se, HP LaserJet 4000t, HP LaserJet 4000tn, HP LaserJet 4050, HP LaserJet 4050n, HP LaserJet 4050se, HP ...