Full Set toner for Lexmark CS331 CS431, Black,/Cyan/ Yellow/ Magenta one for each.
Model: Lexmark 20N10K0_BK; 20N10C0_Cyan; 20N10M0_Magenta; 20N10Y0_Yellow.
Compatible Devices: Lexmark - CS Series CS331dwCS431dw
Lexmark - CX Series CX331adweCX431adw