(Refurbished) Lexmark 500 Sheet Duplex Unit (10G0801) enables two-sided printing capability. This option supports A4, A5, JIS B5, Letter, Legal, Executive and Folio sizes; paper (16 to 47#) and card stock are also acceptable.

Compatible Printers (except dn models):

Lexmark T632 and T634 printers
Lexmark T522 printers
T620 and T622 printers
Lexmark X522, X522s and X620e MFPs
Optra T612, T614 and T616 printers