HP 42X (Q5942X) Black High Yield Original Toner Cartridge HP 42X (Q5942X) toner cartridges work with: HP LaserJet 4250, 4350. Save up to 25% with high-yield HP toner. Cartridge yield (approx.): 20,000 pages Original HP toner cartridges produce an average of 71% more usable pages than non-HP cartridges. What's in the Box: New Original HP 42X (Q5942X) toner cartridge Color: Black