HP 11A (Q6511A) Black Toner Cartridge for HP LaserJet 2420 2430. HP 11A (Q6511A) toner cartridges work with: HP LaserJet 2420, 2430. Original HP toner cartridges produce an average of 71% more usable pages than non-HP cartridges. Cartridge yield (approx.): 6,000 pages. 11A toner is designed to work with your HP printer for high quality, reliable results every print. Ensure that your printing is right the first time and every time with HP printer toner: 11A toner. What’s in the Box: 1 New Original HP 11A (Q6511A) toner cartridge. Color: Black.