Lexmark #40X5403 - Electrostatic Transfer Unit genuine
C540, C543, C544, C546, X543, X544, X546, X549 series color laser printers - IMAGE TRANSFER UNIT (ITU) (also known as transfer belt) (replace approx every 60,000 pages)
Lexmark #C540X31G - Black Developer genuine
C540, C543, C544, X543, X544 Seriescolor printers - Black Developer Unit (approx. 30,000 page yield)
Lexmark #C540X32G - Cyan Developer genuine
C540, C543, C544, X543, X544 Seriescolor printers - Cyan Developer Unit (approx. 30,000 page yield)
Lexmark #C540X33G - Magenta Developer genuine
C540, C543, C544, X543, X544 Seriescolor printers - Magenta Developer Unit (approx. 30,000 page yield)
Lexmark #C540X34G - Yellow Developer genuine
C540, C543, C544, X543, X544 Seriescolor printers - Yellow Developer Unit (approx. 30,000 page yield)
Lexmark #C540X71G - Black Imaging Unit genuine
C540, C543, C544, C546, X543, X544, X546, X548 Series Black Imaging Unit Kit (approx 30,000 page yield)
Lexmark #C540X74G - Black and Color Imaging Unit genuine
C540, C543, C544, C546, X543, X544, X546, X548 Series Black & Color Imaging Unit Kit (approx 30,000 page yield)