Lexmark 40X7855 is compatible in the following Printer Models:

Lexmark Multifunction Mono Laser

Lexmark MX310dn (7015-270)
Lexmark MX410de (7015-470)
Lexmark MX511de (7015-670)
Lexmark MX511dte (7015-670)
Lexmark XM1145 (7015-679)
Lexmark MX611de (7016-670)
Lexmark MX611dte (7016-670)
Lexmark MX611dhe (7016-675)
Lexmark XM3150 (7016-679)
Lexmark XM3150h (7016-679)

Lexmark Multifunction Color Laser

Lexmark X746de (7526-576)
Lexmark X748de (7526-776)
Lexmark X748dte (7526-776)
Lexmark XS748de (7526-779)

Lexmark Mono Laser

Lexmark MX310dn (7015-270)
Lexmark MX511dhe (7015-675)

Lexmark Color Laser

Lexmark X746de (7526-576)
Lexmark X748de (7526-776)
Lexmark X748dte (7526-776)
Lexmark XS748de (7526-779)