The Kyocera KM-4050 laser printer uses the OEM Kyocera laser toner cartridges and supplies. Our compatible toners for Kyocera KM-4050 are manufactured to meet the same original specifications and performance standards as the Kyocera OEM laser toner cartridges. We offer a 100% Quality Satisfaction Guarantee on alternative laser toner cartridges and supplies for use in the Kyocera KM-4050.