• Package Contents:1 Pack MS331 Black Toner Cartridge, 55B1000 Black Toner Cartridge
• Pages: Black per box 3,500 Pages(at 5% coverage)
• Compatible for Printer Models:MS331dn, MS431dn, MS431dw, MX331adn, MX431adn, MX431adw, MX432adwe Printer
• Refined Toner powder ensures professional looking prints and prolongs printer service.
• And we promise a full replacement or refund for every defective items