Product Includes: 1 50F1U00 ultra high yield black laser toner cartridge replacement Page Yield*: 20,000 pages *at 5% coverage (ISO/IEC standard) Compatible with MS Series: MS510dn, MS610de, MS610dn, MS610dte, MS610dtn Printers Color: Black Professional replacements by LD Products This product includes LD Products Toner Cartridge Replacement Compatible with Lexmark 501U 50F1U00 Ultra High Yield (Black) Compatible with Lexmark MS Series: MS510dn, MS610de, MS610dn, MS610dte, MS610dtn printers. Our products are put through a rigorous testing process where they are monitored for quality and reliability. Please note, retail packaging may vary and will only work with printers purchased within the United States and Canada.