These printers use the 15W0900 cartridge:
Lexmark C 720
Lexmark C 720 DN
Lexmark C 720 N
Lexmark Optra C-720
Lexmark Optra C-720 DN
Lexmark Optra C-720 N
Lexmark X 720
Lexmark X 720 Color MFP
Lexmark X 720 MFP
Burroughs-Unisys UDS 170
Burroughs-Unisys UDS 170 N