Genuine Lexmark 55B1H00 Toner Cartridge, High-Yield 15,000 Pages, Black, New. 

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Product Specifications:

• Part Number: 55B1H00

• Color: Black

• Toner Type: Unison™ Laser Toner

• Page Yield: Approximately 15,000 pages at 5% coverage

• Program: Lexmark Return Program (eligible for discounted pricing in exchange for single-use recycling agreement).

Compatible Printer Models:

This cartridge is specifically engineered to work seamlessly with the following monochrome laser printers: 

• MS Series: MS331dn, MS431dn, MS431dw

• MX Series: MX331adn, MX431adn, MX431adw, MX432adwe