These printers use the DR820 cartridge:

Brother DCP L-5500-DN

Brother DCP L-5600-DN

Brother DCP L-5650-DN

Brother DCP L-6600 DW

Brother HL L-5000-D

Brother HL L-5100-DN

Brother HL L-5200-DW

Brother HL L-5200-DWT

Brother HL L-6200-DW

Brother HL L-6200-DWT

Brother HL L-6250-DW

Brother HL L-6300-DW

Brother HL L-6400-DW

Brother HL-L 6400-DWT

Brother HL L-5100 DNT

Brother HL L-6250 DN

Brother HL L-6300 DWT

Brother HL L-6400 DWG

Brother HL L-6400 DWX

Brother MFC L-5700-DW

Brother MFC L-5800-DW

Brother MFC L-5850-DW

Brother MFC L-5900-DW

Brother MFC L-6700-DW

Brother MFC L-6750-DW

Brother MFC L-6800-DW

Brother MFC L-6900-DW

Brother MFC L-5700 DN

Brother MFC L-5750 DW

Brother MFC L-6800 DWT

Brother MFC L-6900 DWG

Brother MFC L-6900 DWT

Brother MFC L-6900 DWX

Brother MFC L-6950 DW