The Lexmark MX511 (500Z) Return Program Imaging Unit (60,000 Yield) works with the following Lexmark printers: MS310, MS312, MS315, MS410, MS415, MS510, MS610, MX310, MX410, MX510, MX511, MX610, MX611. Essential to Lexmark print system performance, genuine Lexmark toner is engineered to work best together with your Lexmark printer, delivering excellent print quality from the first page to the last.