Hewlett Packard C4127A, HP 27A Black Laser Toner, Original HP - LD Products
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Amazon.com: (1-Pack, Super High Yield) TG Imaging Compatible Toner Cartridge Replacement for HP 27X C4127X use in HP Laser Jet 4000 4000N 4000T 4050 4050N LBP-1760 Printer (10,000 Pages) : Office Products
High Yield Toner Cartridge for HP C4127X (HP 27X) – The Printer Depot