When we talk about Brother LC21BK printer Ink Cartridge then it gives you the best. Its high quality prints with true to its original with amaze you.
Its four ink system, one for each color and black helps cut down on ink waste.
It would cost you not more than $4.75.
This cartridge is compatible with various models such as:
IntelliFax-1800C, IntelliFax-3100C, IntelliFax-5100C, MFC-3100, MFC-3100C, MFC-3200C, MFC-5100C, MFC-5200C, MFC-580, MFC-590, MFC-880, MFC-890.