As the highest capacity black cartridge in the LC421 range, the LC421XLBK  offers users of any compatible printer the lowest cost per page possible for an original Brother product. The 500 page estimated yield of the Brother LC421XLBK is sure to be appreciated by anyone lucky enough to own one of the fine colour inkjet printers they are used with. Each LC421XLBK comes fully guaranteed by Brother and the results from the genuine black ink within are absolutely stunning. Each Brother LC421XLBK you purchase from us is delivered to UK mainland addresses for this single low price.