When you refill a LEXMARK X651A11A, X651A21A, X651H04A, X651H11A, X651H21A, X654X04A, X654X11A or X654X21A cartridge, you must replace the chip. This chip is already included with our refill kit for LEXMARK X651.
NOTE: This chip will work only in printers purchased in North America (US and Canada). We sell another chip for other countries.