The remanufactured replacement for the Samsung CLT-K609S black laser toner cartridge is guaranteed to perform with your Samsung CLP-770ND CLP-775ND laser printers. Remanufactured replacements for the CLT-K609S laser toner cartridges and supplies are specially engineered to meet the highest standards of quality, reliability and exceptional yields that meet or exceed OEM Original Equipment Manufacturer standards and offer high-quality printing results. Containing new and used parts, including a new smart chip, they are an economical alternative to expensive Samsung laser toner cartridges and supplies. While most competitors simply refill the toner cartridge and hope the drum and other key components last we fully disassemble the toner cartridge and rebuild it to ensure the highest quality prints. The use of compatible replacement laser toner cartridges and supplies does not void your printers warranty. We offer a Two Year 100% Quality Satisfaction Guarantee on our remanufactured alternatives to CLT-K609S laser toner cartridges and supplies. For use in the following Samsung CLP printers 770ND, 775ND.