HP 45A (Q5945A) Black Original Toner Cartridge HP 45A (Q5945A) toner cartridges work with: HP LaserJet 4345. Original HP toner cartridges produce an average of 71% more usable pages than non-HP cartridges. Cartridge yield (approx.): 18,000 pages 45A toner is designed to work with your HP printer for high quality, reliable results every print. What's in the Box: New Original HP 45A (Q5945A) toner cartridge. Color: Black