HP 29X (C4129X) Black High Yield Toner Cartridge for HP LaserJet 5000 5100. HP 29X (C4129X) toner cartridges work with: HP LaserJet 5000, 5100. Save up to 25% with high-yield HP toner. Original HP Cartridge Yield (approx): 10,000 pages. Original HP toner cartridges produce an average of 71% more usable pages than non-HP cartridges. Ensure that your printing is right the first time and every time with HP printer toner: 29X toner. What's in the Box: 1 New Original HP 29X (C4129X) toner cartridge. Color: Black.