Brother TN-3520. Black toner page yield: 20000 pages, Printing colours: Black, Quantity per pack: 1 pc(s)Compatible Printers: Brother HL-L 6450 DW, Brother HL-L 6400 DWTT, Brother HL-L 6400 DW, Brother MFC-L 6900 DW, Brother HL-L 6400 DWT, Brother MFC-L 6900 DWT, Brother HL-L 6400 Series
