123inkjets offers the best alternative to the original Hewlett Packard CB540A (HP 125A) black laser toner cartridge. Remanufactured with mostly new parts, our HP 125A cartridges are refurbished to perfection for crisp, clear prints, every time. Our CB540A replacement includes a new electronic 'smart chip' that allows your HP printer and the cartridge to interact and track toner usage. Laser toner you can rely on at a price you can afford. Our replacement laser toner cartridges are not remanufactured by HP.