Whilst the Samsung Xpress SL-C460FW and all other compatible printers are incredibly efficient machines sadly they still produce a fractional amount of waste toner in every print and this toner has to go somewhere. In steps the genuine Samsung CLT-W406/SEE which prevents the waste toner from settling inside your printer preventing the colours from reducing the quality of your prints. Maintenance items for laser printers tend to have a very long shelf life and the CLT-W406is no exception.