There has been a very long ongoing issue between me and the Brother company, especially since we only use our printer "lightly", and always on "grayscale" setting..and Brother has admitted that the printer we have is designed to use ALL colors, regardless. If one cartridge is out, it will not print, period, forcing you go constantly back and forth to the store to buy new cartridges at $20-30 each (unless you buy the color kit for $50). I told them I will never buy another Brother product again. However, these cartridges supplied by Monoprice are perfectly compatible, work great, print cleanly, and most of all, EXTREMELY AFFORDABLE. I highly recommend this product and will ALWAYS shop at Monoprice.com for this product. Thanks, Monoprice!!!