These printers use the CLT-C407S cartridge:
Click On a Printer to View it's Cartridges
          Samsung CLP 320
          Samsung CLP 320 N
          Samsung CLP 321
          Samsung CLP 325
          Samsung CLP 325 W
          Samsung CLP 326
          Samsung CLX 3180
          Samsung CLX 3185 FN
          Samsung CLX 3185 FW
          Samsung CLX 3185 N
          Samsung CLX 3186