Our Compatible Toner Cartridges are guaranteed to give you the same results as new Compaq toner cartridges. You use them exactly the same as you would new Compaq toner cartridges - when your printer runs empty, you remove the old toner cartridge, replace it with one of our Compatible Toner Cartridges and continue printing just as you would with a new Compaq toner cartridge.  Save money without compromising print quality!