Superb Choice Compatible Toner Cartridge Replacement for Canon PC-920 PC-921 PC-940 PC-941(3 Black) A Pack of 3 Black Toner Cartridges 1 year replacement warranty,30-day refund guarantee after the purchase. Page Yield: 4,000 pages based on 5-percent coverage(letter/A4). Replacement for Original Model: Canon E40 Compatible Printer: Canon PC-920 PC-921 PC-940 PC-941