The Lexmark 78C0D40 is a yellow developer unit compatible with several Lexmark printer models, including the CS421dn, CS521dn, CS622de, CX421adn, CX522ade, CX622ade, CX625ade, and CX625adhe series. Key features include:

• Outstanding Image Quality: Delivers consistently high-quality prints.
• Long-Life System Reliability: Engineered for durability and long-term use.
• Sustainability: Enhances sustainability with an innovative shake-free print system.
• High Yield: Capable of printing up to 125,000 pages.

This developer unit is optimized for use with Unison™ toner, which is crucial for maintaining the performance and reliability of the Lexmark print system.