Did the ink of your Brother DCP printer run out? You need new Brother 521 cartridges. The Brother LC-512 cartridges are suitable for Brother DCP printers, such as the Brother DCP-J1360DW and Brother DCP-J1260W. You can read for which other printers the 521 Brother cartridges are suitable on the product page. You can print up to 500 pages in color with the Brother LC-521 cartridges.