Compatible with: Lexmark MS Series: MS510dn, MS610de, MS610dn, MS610dte, MS610dtn This is the Ultra Higher Yield Version Compatible with Lexmark 501H 50F1H00 Lexmark 501X 50F1X00 Page Yield*: 20,000* For best results, store in a cool, dry place. Use within 3 years of purchase for optimal performance.*at 5% coverage (ISO/IEC standard) Color: Black Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.