ezink Products offers compatible laser toner cartridges for use in the Samsung ML-1666 printer that are Guaranteed to meet or exceed the print quality of the OEM Samsung MLT-D104S laser toner cartridges. Our compatible laser toners are manufactured with all new parts including OPC drums and wiper blades. Purchasing our laser toner for use in your Samsung ML-1666 is an excellent way to save money without sacrificing quality. Our laser toner cartridges have a '100% Quality & Satisfaction Guarantee'. The use of our compatible laser toner for your Samsung ML-1666 does not void your printer's warranty.