When you refill a LEXMARK 70C0H40 (#700H4), 70C0X40 (#700X4), 70C10Y0 (#701Y), 70C1HY0 (#701HY) or 70C1XY0 (#701XY) cartridge, you must replace the chip. This chip is already included with our refill kit. This chip will run for 3000 pages at 5% coverage.