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Amazon.com: Lexmark - Black - Original - Toner Cartridge LRP MS321, MS331, MS421, MS431, MS521, MS621, MX331, MX421, MX431, MX521 : Everything Else
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Find Genuine Lexmark MS331 / MX331 / MS431 / MX431 Series Return Program Drum Units - 50F0Z00 at Advantage Laser Products!
![I have a Lexmark mx431 and this fell out as I pulled out the paper tray. It still functions fine . What is this used for and how do I replace it ? I have a Lexmark mx431 and this fell out as I pulled out the paper tray. It still functions fine . What is this used for and how do I replace it ?](https://preview.redd.it/y6rw5fkw1y091.jpg?auto=webp&s=c55b7731f7adfbfb0d6d283d965df01fd0f48aff)
I have a Lexmark mx431 and this fell out as I pulled out the paper tray. It still functions fine . What is this used for and how do I replace it ?
![Drum module unit Lexmark MX 431 [Lexmark MX 431 adn] Brand: ORIGINAL Original number: 55B0ZA0 Colour: black Capacity: 40,000 copies Drum module unit Lexmark MX 431 [Lexmark MX 431 adn] Brand: ORIGINAL Original number: 55B0ZA0 Colour: black Capacity: 40,000 copies](https://www.agawa-shop.com/opisy/zdjecia/lexmark.jpg)