Brother TN-3512. Black toner page yield: 12000 pages, Printing colours: Black, Quantity per pack: 1 pc(s)Compatible Printers: Brother HL-L 6400 Series, Brother MFC-L 6900 DWT, Brother MFC-L 6900 DW, Brother HL-L 6300 DW, Brother HL-L 6250 DN, Brother MFC-L 6800 DW, Brother HL-L 6400 DW, Brother DCP-L 6600 DW, Brother HL-L 6400 DWT, Brother MFC-L 6800 DWT, Brother HL-L 6300 DWT, Brother HL-L 6400 DWTT, Brother HL-L 6300 Series, Brother MFC-L 6800 Series, Brother HL-L 6450 DW, Brother MFC-L 6970 DW, Brother MFC-L 6950 DW