These printers use the 80C1SY0 cartridge:
Lexmark CX 310 DN
Lexmark CX 310 N
Lexmark CX 410 DE
Lexmark CX 410 DTE
Lexmark CX 410 E
Lexmark CX 510 DE
Lexmark CX 510 DHE
Lexmark CX 510 DTHE