its just ink ! ink cartridges for a cheaper price ! great quality ! 

BROTHER ALTERNATIVE 

NO: LC 37/57 MAGENTA 

COMPATIBILITY: 

DCP130C

DCP135C

DCP150C

DCP330C

DCP350C

DCP540CN

DCP560CN

FAX1360

FAX2480C

MF260C

MFC560CN

MFC235C

MFC240C

MFC3360C

MFC440CM

MFC465CN

MFC5860CN

MFC665CW

MFC685CW

MFC885CW