When you refill a LEXMARK 80C0H20 (#800H2), 80C0S20 (#800S2), 80C0X20 (#800X2), 80C10C0 (#801C), 80C1HC0 (#801HC), 80C1SC0 (#801SC) or 80C1XC0 (#801XC) cartridge, you must replace the chip. This chip is already included with our refill kit. This chip will run for 2000 pages at 5% coverage.