LD Remanufactured Toner Cartridge Replacement for HP 503A Q7583A (Magenta) 100% Satisfaction & LIFETIME Guarantee Includes a brand new electronic smart chip for easy toner level monitoring For use in HP LaserJet & Color LaserJet 3800, 3800dn, 3800dtn, 3800n, CP3505dn, CP3505n, CP3505x The use of remanufactured cartridges and printing supplies does not void your printers warranty Page Yield: 6,000 | Shelf Life: 24-36 Months | *Average printer cartridge page yield in accordance with ISO 24712