The Brother WT320CL is a genuine waste toner unit designed for use in a select few printers including the Brother HL-L9200CDWT. This Brother WT320CL unit collects residual toner from your prints and stores it away inside the printer. This prevents unnecessary mess inside your printer and ensures that it continues to produce exceptional quality prints. As an original Brother product you can be assured perfect compatibility with your printer and unsurpassed print quality from this Brother WT320CL waste toner unit.