NE IMAGE&copy; - (4 PACK) RESET FLAG GEARS for Brother TN-310, TN-315 Refill Includes: 4 Reset Flag Gears w/Springs The printer displays a "toner life end" message if no reset gear is detected. A reset gear must be installed in any starter cartridge in order for the printer to function properly once the cartridge has been refilled and re-installed in the printer Our products are guaranteed to be great quality and satisfaction is guaranteed This product is only sold by NE IMAGE **Save Money and Go Green**