Our compatible Samsung CLT-K506L black high yield laser toner cartridge is guaranteed to perform with your Samsung CLP-680ND and CLX-6260FD laser printer. Replacing the original Samsung CLT-K506L, our compatible replacement CLT-K506L laser toner cartridges and supplies also known as generic 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. The use of compatible replacement laser toner cartridges and supplies does not void your printers warranty.We offer a 100% Quality Satisfaction Guarantee on our compatible CLT-K506L laser toner cartridges and supplies. For use in the following printers Samsung CLX-6260FW, CLX-6260FD Samsung CLP-680ND