As part of our range of compatible toner cartridges, drum units, ink cartridges, franking ink cartridges, labels and tapes, this BCD - Brother TN3520 Replacement Black Toner is perfect to cope with the stresses and strains of everyday usage. Designed with quality and performance in mind and, together with the low cost, you can work effectively and save money at the same time! To fit the following printers… HLL6400DW, HLL6400DWT, MFCL6900DW, MFCL6900DWT