Includes: 1 Pack 51B1000 Black Toner Cartridge. Compatible Printer Models: MS317dn Printer MS417dn Printer MS517dn Printer MS617dn Printer MX317dn Printer MX417de Printer MX517de Printer MX617de Printer High Page Yield: - High capacity provides more pages to be printed - Approx 2,800 pages per Black Cartridge at 5% coverage.(Letter/A4) Specialists in Print: - Clear and natural printouts - Ensure that your daily printing meets exceptional quality - We offer uniform powder, not easy to drop powder leakage Multi-Scenario Application:Convenient and cost-effective for daily use such as School, Business, Office, Hospital and Home. We would provide attentive customer service: If you have any questions, or the product you received is defective, please contact us as soon as possible, we are honored to help you.(“Order List” -> Search "Order ID -> Click “Contact Seller”.)