LD Compatible Toner Cartridge Replacement for HP 49X Q5949X High Yield (Black, 3-Pack) Page Yield: 6,000* per cartridge | Shelf Life: 24-36 Months per cartridge | *Average printer cartridge page yield in accordance with ISO 19752 We offer lightning fast shipping on all printing supply and inkjet photo paper orders The use of LD replacement ink and toner cartridges does not void your printers warranty All LD branded products are backed by a 100% satisfaction and LIFETIME guarantee For use in the following HP LaserJet printers: 1320, 1320n, 1320nw, 1320t, 1320tn, 3390 & 3392