This black compatible Samsung CLT-506L Series (K506) replacement toner cartridge is for use in the following printers: Samsung CLP-680ND, CLX-6260FD, CLX-6260FW. Our laser toner cartridges are professionally manufactured to produce the best quality prints for your Samsung. All of our replacement cartridges have new internal parts including OPC drums, a new smart chip, and wiper blades. Our replacement cartridges offer an excellent choice over expensive brand name toner cartridges for your printer. All of our cartridges come with a 100% Satisfaction Guarantee!