Without ink, you can't print with your Brother printer. That's why you need Brother 3217 cartridges. The Brother LC-3217 cartridges fit in your Brother MFC printers, such as the MFC-J6530DW and MFC-J6535DW. You can read for which other printers the 3217 Brother cartridges are suitable on the product page. You can print up to 550 pages in color with the Brother LC-3217 cartridges.