Print consistent and professional photos with HP Q5942XD LaserJet 42X Toner Cartridges, compatible with HP LaserJet 4200, 4250, 4350 Printer series. The reliable Toner Cartridges yield up to 20,000 pages and helps you save money giving you double the print volume at a lower price. Features HP Smart Printing technology in the toner cartridge continuously tunes toner particle charge for accurate, consistent results. Compatible with HP LaserJet 4200, 4250, 4350 Printer series Yields about up to 20,000 standard pages *HPs inkjet print cartridges, ink cartridges and printheads are warranted to be free from defects in materials and workmanship during the period of the warranty.