LD Remanufactured Toner Cartridge Replacement for HP 03A C3903A (Black) 100% Satisfaction &amp; LIFETIME Guarantee Fast shipping and award-winning customer service For use in HP LaserJet 5mp, 5p, 6mp, 6p, 6p se, 6Pxi The use of remanufactured cartridges and printing supplies does not void your printers warranty Page Yield Per Cartridge: 4,000* | Shelf Life: 24-36 Months | *Average cartridge page yield in accordance with ISO IEC 24711