ADF Maintenance Kit installation is recommended every 200,000 pages to maintain reliability.Compatible Printers: Lexmark X 952 DHE, Lexmark X 952 Series, Lexmark C 950 DE, Lexmark X 950 Series, Lexmark X 950 DHE, Lexmark X 950 DE, Lexmark X 954 DE, Lexmark X 952 DTE, Lexmark X 954 Series, Lexmark X 954 DHE, Lexmark X 952 DE