This is a genuine replacement piezo igniter with its push button for the Campingaz Twister Plus PZ camping stove (Campingaz is part of the Coleman group). The piezo is the part that makes the spark when you press the button, so the stove lights without matches or a lighter. After a lot of use, or a knock in transit, the igniter can stop sparking, and fitting a new one restores push-button lighting. The kit includes the igniter and the button. Make sure the stove is cold and disconnected from the gas cartridge before fitting.