MICR Font DIMM & Toner Kit for HP 4000/4050 Series Printers
HP LaserJet 4000 4000N 4050 4050N High Yield Black Toner HP C4127X - 27X | eBay
TCT Premium Compatible Toner Cartridge Replacement for HP 27X C4127X Black High Yield Works with HP Laserjet 4000 4000N 4000SE 4000T 4000TN 4050 4050N Printers (10,000 Pages) - 2 Pack - Newegg.com
Amazon.com: Toner Cartridge C4127A For HP LaserJet 4000 (Black) - 10000 yield - Black - With new drum - (Remanufactured) : Office Products
Total 4,000g) BULK Toner Refill for HP Laserjet CP6015, CM6030, CM6040 - 1,000g each