Our Compatible Toner Cartridges are guaranteed to give you the same results as new Panasonic toner cartridges. You use them exactly the same as you would new Panasonic 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 Panasonic toner cartridge.  Save money without compromising print quality!