This is a Genuine  Brother TN3512 Black Laser Toner compatible with the following printers:

Brother HL-L6400
Brother HL-L6400DW
Brother HL-L6400DWT
Brother HL-L6450DW
Brother MFC-L6900DW
Brother MFC-L6900DWT
Brother MFC-L6950DW

This Laser Toner has a Page Yield of 12000